This article is based on the corresponding article in another wiki. For Familypedia purposes, it requires significantly more historical detail on phases of this location's development. The ideal article for a place will give the reader a feel for what it was like to live at that location at the time their relatives were alive there. Also desirable are links to organizations that may be repositories of genealogical information..
Please help to improve this page yourself if you can.

San Mateo County
—  County  —
County of San Mateo
Mount Diablo from SF Bay Discovery Site 10-2-2011 4-24-09 PM.JPG
San Mateo County government center.jpgAño Nuevo State Reserve.JPG
Images, from top down, left to right: View of San Francisco Bay from the San Francisco Bay Discovery Site, San Mateo County Government Center, Año Nuevo State Park
|250px|none|alt=|Skyline of San Mateo County]]

Motto: All of California in One County
[[File:Script error: No such module "Mapframe".|250px|none|alt=|Interactive map of San Mateo County]]Interactive map of San Mateo County
Location in the state of California
Country United States
State California
Region San Francisco Bay Area
Incorporated April 19, 1856[1]
Named for Saint Matthew (English translation)
County seat Redwood City
Largest city Daly City (population)
Redwood City (area)
 • Total 744 sq mi (1,930 km2)
 • Land 448 sq mi (1,160 km2)
 • Water 293 sq mi (760 km2)
Highest elevation[2] 2,603 ft (793 m)
Population (April 1, 2020)[3]
 • Total 764,442
 • Density 1,704/sq mi (658/km2)
Time zone Pacific Time Zone (UTC-8)
 • Summer (DST) Pacific Daylight Time (UTC-7)
Area codes 415/628, 650
FIPS code 06-081
GNIS feature ID 277305
Website [[[wikipedia:wikidata:property|entry]] at Wikidata entry at Wikidata]

San Mateo County ( /ˌsæn məˈt./ SAN-_-mə-TAY-oh), officially the County of San Mateo, is a county located in the U.S. state of California. As of the 2010 census, the population was 718,451.[3] The county seat is Redwood City.[4] San Mateo County is included in the San Francisco-Oakland-Berkeley, CA MSA (metropolitan statistical area), Silicon Valley, and is part of the San Francisco Bay Area, the nine counties bordering San Francisco Bay. It covers most of the San Francisco Peninsula. San Francisco International Airport is located at the northern end of the county. The county's built-up areas are mostly suburban with some areas being very urban, and are home to several corporate campuses.


San Mateo County was formed in 1856 upon the division of San Francisco County, one of the state's 18 original counties established at California statehood in 1850. Until 1856, San Francisco's city limits extended west to Divisadero Street and Castro Street, and south to 20th Street. In 1856, the California state government divided the county. A straight line was then drawn across the tip of the San Francisco Peninsula just north of San Bruno Mountain. Everything south of the line became the new San Mateo County while everything north of the line became the new consolidated City and County of San Francisco.[5] San Mateo County was officially organized on April 18, 1857 under a bill introduced by Senator T.G. Phelps. The 1857 bill defined the southern boundary of San Mateo County as following the south branch of San Francisquito Creek to its source in the Santa Cruz Mountains and thence due west to the Pacific Ocean, and named Redwood City as the county seat.[6] San Mateo County then annexed part of northern Santa Cruz County in March 1868, including Pescadero and Pigeon Point.[7][6]

Although the formation bill named Redwood City the county seat, a May 1856 election marked by "unblushing frauds perpetuated on an unorganized and wholly unprotected community by thugs and ballot stuffers from San Francisco" named Belmont the county seat.[8] The election results were declared illegal and the county government was moved to Redwood City, with land being donated from the original Pulgas Grant for the county government on February 27, 1858.[8] Redwood City's status as county seat was upheld in two successive elections in May 1861 and December 9, 1873, defeating San Mateo and Belmont.[8] Another election in May 1874 named San Mateo the county seat, but the state supreme court overturned that election on February 24, 1875, and the county seat has remained at Redwood City ever since.[8]

San Mateo County bears the Spanish name for Saint Matthew. As a place name, San Mateo appears as early as 1776 in the diaries of Anza and Font.[9] Several local geographic features were also designated San Mateo on early maps including variously: a settlement, an arroyo, a headland jutting into the Pacific (Point Montara), and a large land holding (Rancho San Mateo). Until about 1850, the name appeared as San Matheo.

Japanese Americans in San Mateo[]

The Japanese first arrived in San Mateo County and were part of a group guided by Ambassador Tomomi Iwakura back in 1872.[10] There were a number of all-male Japanese students who came to San Mateo to learn English and many other helpful skills to bring back to Japan.[11] These students were also some of the first Japanese to join American students in the Belmont School for Boys. These students had to work for their housing and food before classes and in the evenings.[11] Many of the first Japanese immigrants were able to find jobs as gardeners and landscapers In San Mateo. Most of them had a good educational background from their homelands, but their lack of knowledge of the English language made it difficult for them to find other jobs in the beginning.[12]


According to the U.S. Census Bureau, the county has a total area of 741 square miles (1,920 km2), of which 448 square miles (1,160 km2) is land and 293 square miles (760 km2) (40%) is water.[13] It is the third-smallest county in California by land area. A number of bayside watercourses drain the eastern part of the county including San Bruno Creek and Colma Creek. Streams draining the western county include Frenchmans Creek, Pilarcitos Creek, Naples Creek, Arroyo de en Medio, and Denniston Creek. These streams originate along the northern spur of the Santa Cruz Mountains that run through the county. The northern and northeastern parts of the county are very heavy densely populated with largely urban and suburban areas, with many of its cities as edge-cities for the Bay Area, while the deep south and the west-central parts of the county are less densely populated with more rural environment and coastal beaches areas.

The Santa Cruz Mountains cross through San Mateo County. In comparison to the rest of the county, the area is quite rural and forested.


San Mateo County straddles the San Francisco Peninsula, with the Santa Cruz Mountains running its entire length. The county encompasses a variety of habitats, including estuarine, marine, oak woodland, redwood forest, coastal scrub and oak savannah. There are numerous species of wildlife present, especially along the San Francisco Bay estuarine shoreline, San Bruno Mountain, Fitzgerald Marine Reserve and the forests on the Montara Mountain block. Several creeks discharge to the San Francisco Bay, including San Mateo Creek and Laurel Creek, and several coastal streams discharge to the Pacific Ocean, such as Frenchmans Creek and San Vicente Creek.

Año Nuevo State Marine Conservation Area and Greyhound Rock State Marine Conservation Area are two adjoining marine protected areas off the coast of San Mateo County. Like underwater parks, these marine protected areas help conserve ocean wildlife and marine ecosystems.

Flora and fauna[]

The county is home to several endangered species including the San Francisco garter snake and the San Bruno elfin butterfly, both of which are endemic to San Mateo County. The endangered Ridgway's Rail is also found on the shores of San Francisco Bay, in the cities of Belmont and San Mateo. The endangered wildflower Hickman's potentilla is found near the Pacific Ocean on the lower slopes of Montara Mountain. The endangered wildflowers White-rayed pentachaeta, Pentachaeta bellidiflora, San Mateo Woolly Sunflower, Eriophyllum latilobum, Marin Dwarf Flax, Hesperolinon congestum and the San Mateo Thornmint, Acanthomintha duttonii, are found in the vicinity of the Crystal Springs Reservoir.

In May 2014, a California condor was spotted near Pescadero, a coastal community south of San Francisco[14]—it was the first California condor spotted in San Mateo County since 1904.[14] The condor, tagged with the number "597", and also known as "Lupine", is one of 439 condors living in the wild or captivity in California, Baja California and Arizona.[14][15] The three-year-old female flew more than 100 miles (160 km) north from Pinnacles National Park, in San Benito County, on May 30, and landed on a private, forested property near Pescadero, on the San Mateo County Coast, where it was photographed by a motion-activated wildlife camera.[14] Harold Heath, Professor Emeritus, of Stanford University was responsible for the 1904 sighting, 1 mile (1.6 km) west of the University campus.[14][16]

Pumas (Puma concolor), also known as cougars or mountain lions, roam the county.[17]

Tule elk (Cervus canadensis nannodes) were native to San Mateo County and among the "favored foods" of the Ohlone people based on ethnohistoric and archeological evidence there.[18] The discovery of two elk specimens made news in 1962, one a royal elk (royal elk bulls have six tines per antler) from a peat bog excavated in Pacifica's historic Laguna Alta, and now in the Museum of Vertebrate Zoology collection.[19][20] These may date from the time of Spanish settlement.[21] Laguna Alta lay just south of the Interstate 280 and Skyline Boulevard intersection, east of Mussel Rock.[22] The California Academy of Sciences also has an elk skull fragment collected one mile inland from the mouth of Purisima Creek in 1951.[23] Additional coastal elk remains dating from the Middle and Late Periods in Northern California were found in at least five more late Holocene archeological sites in San Mateo County: SMA-115 (Montara State Beach site), SMA-118 (Bean Hollow State Beach site), SMA-244 (Butano Ridge site), SMA-97 (Año Nuevo Creek site) and SMA-218 (Año Nuevo State Reserve site).[24] On the eastern side of the San Francisco Peninsula, elk remains were also unearthed at multiple archaeological sites along San Francisquito Creek.[25][26]

National protected areas[]

  • Don Edwards San Francisco Bay National Wildlife Refuge (part)
  • Golden Gate National Recreation Area (part)

Marine protected area[]

  • Montara State Marine Reserve & Pillar Point State Marine Conservation Area

County parks[]

Template:OSM Location map The County of San Mateo Parks Department operates 22 parks, trails, and historic sites spread throughout the county:

San Mateo County Parks[27]
Name Image Est. Size City Ref.
1 Coyote Point
  • Marina
  • Recreation Area
Zeppelin-ride-020100925-130 (5028699547).jpg Template:Convert/+[lower-alpha 1] San Mateo/Burlingame [28][29]
2 Crystal Springs
  • San Andreas
  • Sawyer Camp
  • Crystal Springs
Lake San Andreas - Sawyer Camp Trail (15916868610).jpg Template:Convert/LoffAonDbrSoff Burlingame [30]
3 Devil's Slide Devil's Slide Trail, which used to be an unstable part of California Highway 1 until they built bypass tunnels and turned it into a nature reserve. (26033922316).jpg Template:Convert/LoffAonDbrSoff Pacifica/Montara [31]
4 Edgewood Monday Night Birding (14177890134).jpg Template:Convert/LoffAonDbrSoff Redwood City [32]
5 Fitzgerald[lower-alpha 2] JV Fitzgerald Marine Reserve 04 (11013086134).jpg 1969 Moss Beach [33][29]
6 Flood Template:Convert/LoffAonDbrSoff Menlo Park [34]
7 Friendship <Template:Convert/LoffAonDbrSoff Redwood City [35]
8 Huddart Template:Convert/LoffAonDbrSoff Woodside [36]
9 Junipero Serra Template:Convert/LoffAonDbrSoff San Bruno [37]
10 Memorial 1924 Template:Convert/LoffAonDbrSoff Loma Mar [38]
11 Mirada Surf Template:Convert/+[lower-alpha 3] El Granada [28][29]
12 Moss Beach 2014 Template:Convert/LoffAonDbrSoff Moss Beach [28][29]
13 Pescadero Creek Entering the Park (5365626915).jpg Template:Convert/LoffAonDbrSoff Loma Mar [39]
14 Pillar Point Template:Convert/LoffAonDbrSoff Moss Beach [40]
15 Quarry Template:Convert/LoffAonDbrSoff El Granada [41]
16 Sam McDonald Sam McDonald County Park (16121518351).jpg Template:Convert/LoffAonDbrSoff Loma Mar [42]
17 San Bruno Mountain Aerial view of San Bruno Mountain.jpg Template:Convert/LoffAonDbrSoff Brisbane [43]
18 San Pedro Valley Template:Convert/LoffAonDbrSoff Pacifica [44]
19 Sanchez Adobe Sánchez Adobe exterior 2.JPG Template:Convert/LoffAonDbrSoff Pacifica [45]
20 Tunitas Creek Beach Tuitas Beach and Ocean Shore Railroad.jpg Half Moon Bay [46]
21 Woodside Store Woodside store.jpg Woodside [47]
22 Wunderlich Template:Convert/LoffAonDbrSoff Woodside [48]
  1. ^ 149 acres of land, 538 acres underwater
  2. ^ Wholly contained within the Montara State Marine Reserve
  3. ^ Divided by State Route 1 into the 15-acre Mirada Surf West and 34-acre East.

Prior to the rebuilding of the San Mateo Bridge that began in 1996, the county had also operated Werder Pier for fishermen; it had been the western segment of the original 1929 vertical-lift bridge.

In addition to the county-operated parks, San Mateo County voters created the Midpeninsula Regional Open Space District in 1972, administered by the Peninsula Open Space Trust, which owns several protected spaces within San Mateo County (as well as within Santa Clara and Santa Cruz counties). San Mateo County protected spaces administered by POST include:[49]

  • Coal Creek Open Space Preserve
  • El Corte de Madera Creek
  • La Honda Creek Open Space Preserve
  • Long Ridge Open Space Preserve (partially within Santa Clara County)
  • Los Trancos Open Space Preserve (partially within Santa Clara County)
  • Pulgas Ridge Open Space Preserve
  • Purisima Creek Redwoods Open Space Preserve
  • Ravenswood Open Space Preserve
  • Russian Ridge Open Space Preserve
  • Skyline Ridge Open Space Preserve
  • Teague Hill Open Space Preserve
  • Thornewood Open Space Preserve
  • Windy Hill Open Space Preserve

State parks[]

  • Año Nuevo State Park
  • Butano State Park
  • Castle Rock State Park
  • Heritage Grove
  • Portola Redwoods State Park
  • Quarry Park
  • Burleigh H. Murray Ranch
  • Pigeon Point Light Station Historic State Park
  • Point Montara Light Station State Park
  • San Bruno Mountain State Park

State beaches[]

  • Año Nuevo State Reserve
  • Bean Hollow State Beach
  • Big Basin State Beach
  • Gray Whale Cove State Beach
  • Half Moon Bay State Beach
  • Montara State Beach
  • Pacifica State Beach
  • Pebble Beach
  • Pescadero State Beach
  • Pomponio State Beach
  • San Gregorio State Beach
  • Thornton State Beach


As of 2012, San Mateo County had one of the largest Tongan communities outside of Tonga, with an estimated 13,000 Tongan Americans.[50]


Places by population, race, and income[]


Historical populations
Census Pop.
1860 3,214
1870 6,635 106.4%
1880 8,669 30.7%
1890 10,087 16.4%
1900 12,094 19.9%
1910 26,585 119.8%
1920 36,781 38.4%
1930 77,405 110.4%
1940 111,782 44.4%
1950 235,659 110.8%
1960 444,387 88.6%
1970 556,234 25.2%
1980 587,329 5.6%
1990 649,623 10.6%
2000 707,161 8.9%
2010 718,451 1.6%
U.S. Decennial Census[59]
1790–1960[60] 1900–1990[61]
1990–2000[62] 2010–2020[63]

The 2010 United States Census reported that San Mateo County had a population of 718,451. The racial makeup of San Mateo County was 383,535 (53.4%) White, 20,436 (2.8%) African American, 3,306 (0.5%) Native American, 178,118 (24.8%) Asian (9.8% Filipino, 9.0% Chinese, 1.9% Indian, 1.2% Japanese, 0.8% Korean, 0.5% Vietnamese, 0.3% Burmese, 0.1% Pakistani), 10,317 (1.4%) Pacific Islander (0.6% Tongan, 0.3% Samoan, 0.2% Fijian, 0.1% Native Hawaiian), 84,529 (11.8%) from other races, and 38,210 (5.3%) from two or more races. Hispanic or Latino of any race were 182,502 persons (25.4%); 15.7% of San Mateo County is Mexican, 2.7% Salvadoran, 1.2% Guatemalan, 1.2% Nicaraguan, 0.7% Peruvian, 0.6% Puerto Rican, 0.2% Colombian, and 0.2% Cuban.[64]


Age distribution (2000 census)

As of the census of 2009,[66] there were 714,936 people, 258,648 households, and 174,582 families residing in the county. The population density was 2,753/sq mi (825/km2). There were 284,471 housing units at an average density of 789/sq mi (432/km2). 7.4% were of Italian, 7.1% Irish, 7.0% German and 5.3% English ancestry according to Census 2000. 46.9% spoke English, 28.4% Spanish, 6.2% Tagalog, 4.0% Chinese or Mandarin and 1.1% Cantonese, and other language 4.2%, as their first language from estimate census 2009.

There were 258,648 households, out of which 30% had children under the age of 18, 48.6% were married couples living together, 14.7% had a female householder with no husband present, and 41.7% were non-families. 31.5% of all households were made up of individuals, and 6.2% had someone living alone who was 65 years of age or older. The average household size was 3.79 and the average family size was 4.44.

In the county, the population was spread out, with 28.6% under the age of 18, 15.9% from 18 to 24, 25.8% from 25 to 44, 21% from 45 to 64, and 9.7% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 97.8 males. For every 100 females age 18 and over, there were 95.1 males.

The median income for a household in the county was $69,306, and the median income for a family was $77,737. Males had a median income of $48,342 versus $45,383 for females. The per capita income for the county was $36,045. About 6.42% of families and 9.51% of the population were below the poverty line, including 10.01% of those under age 18 and 8.52% of those age 65 or over.


San Mateo County has a five-member Board of Supervisors, representing five geographic districts, elected at-large until November 2012. On November 6, 2012, Measure B passed[67] to amend the San Mateo County Charter so that each member of the Board of Supervisors will cease to be elected by an at-large vote of all the voters in the County, but is instead elected only by the voters of his or her district.[68]

San Mateo County is split between California's 14th and 18th congressional districts, represented by Jackie Speier (DHillsborough) and Anna Eshoo (DAtherton), respectively.[69]

In the California State Assembly, San Mateo County is split between three legislative districts:[70]

  • the 19th Assembly District, represented by Democrat   Phil Ting,
  • the 22nd Assembly District, represented by Democrat   Kevin Mullin, and
  • the 24th Assembly District, represented by Democrat   Rich Gordon.

In the California State Senate, San Mateo is split between the 11th and 13th districts, represented by Mark Leno and Jerry Hill, respectively.[71]


Presidential election results and voter registration[]

United States presidential election results for San Mateo County, California[72]
Year Republican Democratic Third party
No.  % No.  % No.  %
2020 75,584 20.20% 291,496 77.89% 7,171 1.92%
2016 57,929 18.43% 237,882 75.67% 18,573 5.91%
2012 72,756 25.46% 206,085 72.13% 6,879 2.41%
2008 75,057 24.75% 222,826 73.47% 5,409 1.78%
2004 83,315 29.25% 197,922 69.48% 3,620 1.27%
2000 80,296 30.95% 166,757 64.29% 12,346 4.76%
1996 73,508 29.22% 152,304 60.55% 25,720 10.23%
1992 75,080 27.15% 149,232 53.97% 52,196 18.88%
1988 109,261 42.94% 141,859 55.74% 3,360 1.32%
1984 135,185 51.87% 122,268 46.91% 3,178 1.22%
1980 116,491 48.82% 87,335 36.60% 34,811 14.59%
1976 117,338 50.63% 102,896 44.40% 11,507 4.97%
1972 135,377 52.82% 109,745 42.82% 11,175 4.36%
1968 98,654 43.72% 106,519 47.20% 20,495 9.08%
1964 77,916 35.55% 140,978 64.32% 297 0.14%
1960 104,570 51.70% 97,154 48.04% 528 0.26%
1956 100,049 61.04% 63,637 38.83% 217 0.13%
1952 92,279 63.61% 52,149 35.95% 651 0.45%
1948 48,909 56.69% 34,215 39.66% 3,148 3.65%
1944 33,590 49.15% 34,594 50.62% 158 0.23%
1940 26,539 46.60% 29,831 52.38% 581 1.02%
1936 13,650 33.09% 27,087 65.67% 511 1.24%
1932 13,442 39.68% 19,094 56.36% 1,343 3.96%
1928 14,360 58.87% 9,755 39.99% 277 1.14%
1924 8,126 55.27% 771 5.24% 5,805 39.48%
1920 7,205 70.52% 1,958 19.16% 1,054 10.32%
1916 5,207 50.01% 4,485 43.08% 719 6.91%
1912 7 0.10% 3,246 46.47% 3,732 53.43%
1908 2,865 62.91% 1,314 28.85% 375 8.23%
1904 2,146 68.45% 851 27.15% 138 4.40%
1900 1,645 63.00% 914 35.01% 52 1.99%
1896 1,607 61.10% 987 37.53% 36 1.37%
1892 1,088 50.56% 1,020 47.40% 44 2.04%
1888 1,121 52.95% 980 46.29% 16 0.76%
1884 950 55.33% 750 43.68% 17 0.99%
1880 760 51.01% 720 48.32% 10 0.67%


Historically, San Mateo County was a Republican stronghold in presidential elections. From 1880 until 1988, the only Democrats to carry San Mateo County were Woodrow Wilson, Franklin Roosevelt, Lyndon Johnson, and Hubert Humphrey. Like virtually all counties in the Bay Area, San Mateo today is a strongly Democratic county in presidential and congressional elections. The last Republican to win a majority in the county was Ronald Reagan in 1984.

Cities by population and voter registration[]


The California Secretary of State, as of February 2019, reports that San Mateo County has 404,958 registered voters.[74] Of those voters, 202,341 (50%) are registered Democratic, 60,045 (14.3%) are registered Republican, 15,834 (3.9%) are registered with other political parties, and 126,738 (31.3%) declined to state a political party preference. Every city, town, and unincorporated area of San Mateo County has more registered Democrats than Republicans.

On November 4, 2008, San Mateo County voted 61.8% against Proposition 8, which amended the California Constitution to ban same-sex marriages.[75]


The following table includes the number of incidents reported and the rate per 1,000 persons for each type of offense.

Cities by population and crime rates[]


A July 2013 Wall Street Journal article identified the Facebook initial public offering (IPO) as the cause of a change in the U.S.' national economic statistics, as San Mateo County—the home of the company—became the top wage-earning county in the country after the fourth quarter of 2012. The article revealed that the Bureau of Labor Statistics reported that the average weekly wage in the county was $3,240, which is 107% higher than the previous year: "That’s the equivalent of $168,000 a year, and more than 50% higher than the next highest county, New York County (better known as Manhattan), which came in at $2,107 a week, or roughly $110,000 a year."[79]

Additionally, San Mateo County hosts the headquarters of Visa Inc, Sony Interactive Entertainment, Electronic Arts, YouTube, Genentech, and Gilead Sciences, as well as a hub of venture capital firms in Menlo Park and several other technology-related companies.

In 2016, Peninsula Clean Energy began providing electricity to 20 percent of residential customers, all municipalities, and all small- to mid-size businesses in the county, as a Community Choice Aggregation program, an alternative to Pacific Gas and Electric.[80]


The people of San Mateo County may use the services of San Mateo County Libraries along with the Peninsula Library System and its dozens of branches, bookmobile and Library-a-Go-Go machine at the Millbrae BART/Caltrain station.

The county is divided into several public school districts and is also served by the local Catholic diocese and many other private parochial and secular schools. The San Mateo County Board of Education oversees early education, special education, and the court and community schools program in the county, as well as serves as an appeal board for the adjudication of expulsion appeals, interdistrict attendance appeals, and charter schools.

Some students in San Mateo County's public schools attend outdoor education in La Honda. San Mateo Outdoor Education is a residential school that teaches major concepts of ecology via exploration of forest, pond, garden, tidepool, wetland, and sandy shore habitats.[81] The center's mascot is the banana slug, a large yellow gastropod. The school uses songs from the famous Banana Slug String Band.

Template:San Mateo County, California Schools


Major highways[]

  • I-280 (CA).svg Interstate 280
  • I-380 (CA).svg Interstate 380
  • US 101 (1961 cutout).svg U.S. Route 101
  • California 1.svg State Route 1
  • California 9.svg State Route 9
  • California 35.svg State Route 35
  • California 82.svg State Route 82 (El Camino Real)
  • California 84.svg State Route 84 (Dumbarton Bridge)
  • California 92.svg State Route 92 (San Mateo Bridge)
  • California 109.svg State Route 109
  • California 114.svg State Route 114

Public transportation[]

SamTrans (San Mateo County Transit District) provides local bus service within San Mateo County. Local and commuter bus routes also operate into San Francisco.

Caltrain, the commuter rail system, traverses the county from north to south, running alongside the Highway 101 corridor for most of the way.

Bay Area Rapid Transit (BART) trains serve San Francisco International Airport and the northern portion of the county, terminating at Millbrae.

Caltrain, BART, and SamTrans converge at the Millbrae Intermodal station.


San Francisco International Airport is geographically located in San Mateo County, but it is owned and operated by the City and County of San Francisco.

San Mateo County does own two general aviation airports: Half Moon Bay Airport and San Carlos Airport.[82]

Marine transport[]

The only deepwater port in South San Francisco Bay is the Port of Redwood City, situated along Redwood Creek, originally created as a lumber embarcadero in 1850. The San Mateo Harbor Harbor District manages the Pillar Point Harbor and Oyster Point Marina. Ferry connections connect Oyster Point to Jack London Square in Oakland and the Alameda Ferry Terminal in Alameda.

Notable structures[]

There are a number of well-known structures within San Mateo County:

  • Carolands Mansion, Hillsborough
  • Cow Palace, Daly City
  • Uplands Mansion, Hillsborough
  • Crystal Springs Reservoir, unincorporated central part of county
  • CuriOdyssey, San Mateo
  • Filoli Mansion, Woodside
  • The Flintstone House, Hillsborough
  • Notre Dame de Namur University, Belmont, which incorporates Ralston Hall
  • Pigeon Point Lighthouse, Pescadero
  • Point Montara Lighthouse, Montara
  • Pulgas Water Temple, Woodside
  • Sanchez Adobe, Pacifica
  • San Mateo County History Museum, Redwood City[83]
  • San Francisco International Airport
  • Stanford Linear Accelerator Center, Menlo Park




Census-designated places[]

  • Broadmoor
  • El Granada
  • Emerald Lake Hills
  • Highlands-Baywood Park
  • Ladera
  • La Honda
  • Loma Mar
  • Montara
  • Moss Beach
  • North Fair Oaks
  • Pescadero
  • West Menlo Park

Unincorporated communities[]

  • Burlingame Hills
  • Devonshire
  • Kings Mountain
  • Los Trancos Woods
  • Menlo Oaks
  • Palomar Park
  • Princeton-by-the-Sea
  • San Gregorio
  • Sky Londa

Population ranking[]

The population ranking of the following table is based on the 2010 census of San Mateo County.[84]

county seat

Rank City/Town/etc. Municipal type Population (2010 Census)
1 Daly City City 101,123
2 San Mateo City 97,207
3 Redwood City City 76,815
4 South San Francisco City 63,632
5 San Bruno City 41,114
6 Pacifica City 37,234
7 Menlo Park City 32,026
8 Foster City City 30,567
9 Burlingame City 28,806
10 San Carlos City 28,406
11 East Palo Alto City 28,155
12 Belmont City 25,835
13 Millbrae City 21,532
14 North Fair Oaks CDP 14,687
15 Half Moon Bay City 11,324
16 Hillsborough Town 10,825
17 Atherton Town 6,914
18 El Granada CDP 5,467
19 Woodside Town 5,287
20 Portola Valley Town 4,353
21 Brisbane City 4,282
22 Emerald Lake Hills CDP 4,278
23 Broadmoor CDP 4,176
24 Highlands-Baywood Park CDP 4,027
25 West Menlo Park CDP 3,659
26 Moss Beach CDP 3,103
27 Montara CDP 2,909
28 Colma Town 1,792
29 Ladera CDP 1,426
30 La Honda CDP 928
31 Pescadero CDP 643
32 Loma Mar CDP 113

See also[]

  • List of school districts in San Mateo County, California
  • List of California Historical Landmarks in San Mateo County, California
  • National Register of Historic Places listings in San Mateo County, California
  • Peninsula Humane Society
  • Seaport Centre
  • Telephone Area code 650
  • Leo J. Ryan Memorial Park
  • Leo J. Ryan Federal Building
  • Silicon Valley
  • Thomas Bones (1842–1929), lumberman in this area
  • Second Harvest of Silicon Valley


  1. ^ Other = Some other race + Two or more races
  2. ^ Native American = Native Hawaiian or other Pacific Islander + American Indian or Alaska Native
  3. ^ a b Percentage of registered voters with respect to total population. Percentages of party members with respect to registered voters follow.


  1. ^ "San Mateo County". Geographic Names Information System, U.S. Geological Survey. 
  2. ^ "Long Ridge". 
  3. ^ a b "State & County QuickFacts". United States Census Bureau. 
  4. ^ "Find a County". National Association of Counties. 
  5. ^ Statutes of California and Digests of Measures. J. Winchester. 1856. p. 145. 
  6. ^ a b Alexander, Philip W.; Hamm, Charles P. (1916). History of San Mateo County: from the earliest times with a description of its resources and advantages; and the biographies of its representative men. Burlingame, California: Burlingame Publishing Company. p. 22. 
  7. ^ "California Maps". CA Genealogy. 1856. 
  8. ^ a b c d Alexander & Hamm (1916), p. 24.
  9. ^ Gudde, Erwin G. (2004). California Place Names (Fourth ed.). University Of California Press. pp. 341. ISBN 0-520-24217-3. 
  10. ^ Yamada, Gayle K.; Fukami, Dianne (2003). Building A Community: The story of Japanese Americans in San Mateo County. AACP, Inc. pp. 1. ISBN 0-934609-10-1. 
  11. ^ a b Yamada, Gayle K.; Fukami, Dianne (2003). Building A Community: The story of Japanese Americans in San Mateo County. AACP, Inc. pp. 2–3. ISBN 0-934609-10-1. 
  12. ^ Yamada, Gayle K.; Fukami, Dianne (2003). Building a Community: The Story of Japanese Americans in San Mateo County. AACP, Inc. pp. 14. ISBN 0-934609-10-1. 
  13. ^ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. 
  14. ^ a b c d e P. Rogers (June 14, 2014). "First California condor spotted in San Mateo County since 1904". Vallejo Times Herald. 
  15. ^ "California Condor Recovery Program (monthly status report)". National Park Service. June 30, 2014. 
  16. ^ "Memorial Resolution Harold Heath (1868 – 1951)". Historical Society Stanford. 1951. 
  17. ^ "Mountain lion dies after being hit by car on Highway 280 in San Mateo County" (in en). ABC7 San Francisco. September 15, 2019. 
  18. ^ (1971) "Contributions to the Archaeology of San Mateo County. I: Introduction, Prior Archaeological Work in the San Francisco Bay Region". San Francisco State College Treganza Anthropology Museum Papers 8: 1–8. 
  19. ^ Norton Pearl (May 1, 1962). "Royal Elk Fossil Found in San Mateo County, May 1962". San Mateo County Historical Association. 
  20. ^ "Mammal Collection, Museum of Vertebrate Zoology at Berkeley". 
  21. ^ Dale R. McCullough (May 1, 1965). "Deposit on the San Francisco Peninsula". Journal of Mammalogy 46: 347–348. DOI:10.2307/1377873. 
  22. ^ Robert W. Givler; Janet M. Sowers (2007). "Creek & Watershed Map of Daly City and Vicinity". Oakland Museum. 
  23. ^ "Cervus elaphus nannodes". 
  24. ^ Mark Gerald Hylkema (1991). Prehistoric native American adaptations along the central California coast of San Mateo and Santa Cruz counties (Thesis). San Jose State University. 
  25. ^ Barbara Bocek (1988). "Sites and Site Clusters: Middle Period Archaeology of the San Francisquito Drainage". Society of California Archaeology Proceedings 1: 299–309. 
  26. ^ Barbara Bocek (1992). "Subsistence, Settlement and Tribelet Territories on the Eastern San Francisco Peninsula". Society of California Archaeology Proceedings 5: 269–297. 
  27. ^ "San Mateo County Parks". Parks Department, County of San Mateo. 
  28. ^ a b c "Coyote Point Recreation Area". Parks Department, County of San Mateo. 
  29. ^ a b c d "Coyote Point Marina". Parks Department, County of San Mateo. 
  30. ^ "Crystal Springs Regional Trail". Parks Department, County of San Mateo. 
  31. ^ "Devil's Slide Trail". Parks Department, County of San Mateo. 
  32. ^ "Edgewood Park & Natural Preserve". Parks Department, County of San Mateo. 
  33. ^ "Fitzgerald Marine Reserve". Parks Department, County of San Mateo. 
  34. ^ "Flood Park". Parks Department, County of San Mateo. 
  35. ^ "Friendship Park". Parks Department, County of San Mateo. 
  36. ^ "Huddart Park". Parks Department, County of San Mateo. 
  37. ^ "Junipero Serra Park". Parks Department, County of San Mateo. 
  38. ^ "Memorial Park". Parks Department, County of San Mateo. 
  39. ^ "Pescadero Creek Park". Parks Department, County of San Mateo. 
  40. ^ "Pillar Point Bluff". Parks Department, County of San Mateo. 
  41. ^ "Quarry Park". Parks Department, County of San Mateo. 
  42. ^ "Sam McDonald Park". Parks Department, County of San Mateo. 
  43. ^ "San Bruno Mountain State & County Park". Parks Department, County of San Mateo. 
  44. ^ "San Pedro Valley Park". Parks Department, County of San Mateo. 
  45. ^ "Sanchez Adobe". Parks Department, County of San Mateo. 
  46. ^ "Tunitas Creek Beach". Parks Department, County of San Mateo. 
  47. ^ "Woodside Store". Parks Department, County of San Mateo. 
  48. ^ "Wunderlich Park". Parks Department, County of San Mateo. 
  49. ^ "Welcome to the Midpeninsula Regional Open Space District". Peninsula Opens Space Trust. 
  50. ^ "Tongans mourn passing of king". San Mateo Daily Journal. March 20, 2012. 
  51. ^ a b c d e f g h i j k l m n o p q U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B02001. U.S. Census website. Retrieved October 26, 2013.
  52. ^ a b U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B03003. U.S. Census website. Retrieved October 26, 2013.
  53. ^ a b U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19301. U.S. Census website. Retrieved October 21, 2013.
  54. ^ a b U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19013. U.S. Census website. Retrieved October 21, 2013.
  55. ^ a b U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19113. U.S. Census website. Retrieved October 21, 2013.
  56. ^ a b U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates. U.S. Census website. Retrieved October 21, 2013.
  57. ^ U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B01003. U.S. Census website. Retrieved October 21, 2013.
  58. ^ Data unavailable
  59. ^ "U.S. Decennial Census". United States Census Bureau. 
  60. ^ "Historical Census Browser". University of Virginia Library. 
  61. ^ Forstall, Richard L., ed (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. 
  62. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000". United States Census Bureau. April 2, 2001. 
  63. ^ "2020 Population and Housing State Data". United States Census Bureau. 
  64. ^ "2010 Census P.L. 94-171 Summary File Data". United States Census Bureau. 
  65. ^ "San Mateo County". 
  66. ^ "U.S. Census website". United States Census Bureau. 
  67. ^ "Election Results November 6, 2012 Presidential General Election". Shape the Future. Vote!. Registration & Elections Division. November 6, 2012. 
  68. ^ "Measure B". San Mateo County. Registration & Elections Division. August 2012. 
  69. ^ "California's 14th Congressional District - Representatives & District Map". Civic Impulse, LLC. 
  70. ^ "Communities of Interest — County". California Citizens Redistricting Commission. 
  71. ^ "Communities of Interest — County". California Citizens Redistricting Commission. 
  72. ^
  73. ^ a b c d e f g h i j k l m n o p q California Secretary of State. February 10, 2013 - Report of Registration Script error: No such module "webarchive".. Retrieved October 31, 2013.
  74. ^
  75. ^ California Secretary of State. "State Ballot Measures (Proposition Numbers 1A-12) by County". 
  76. ^ a b c d e f g h i j Office of the Attorney General, Department of Justice, State of California. Table 11: Crimes – 2009 Script error: No such module "webarchive".. Retrieved November 14, 2013.
  77. ^ Only larceny-theft cases involving property over $400 in value are reported as property crimes.
  78. ^ a b c United States Department of Justice, Federal Bureau of Investigation. Crime in the United States, 2012, Table 8 (California). Retrieved November 14, 2013.
  79. ^ Scott Thurm (July 2, 2013). "How Facebook's IPO Created the Best-Paid County In America". The Wall Street Journal. 
  80. ^ [1]
  81. ^ San Mateo County Office of Education. "Information for Parents About Outdoor Education". 
  82. ^ San Mateo County Public Works. "San Mateo County – Public Works – General Aviation Airports". 
  83. ^ "Discovering our Maritime History at the San Mateo County Historical Museum". 
  84. ^ "2010 U.S. Census website". United States Census Bureau. 

External links[]

Wikimedia Commons has media related to:

Template:San Francisco Peninsula