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Stephenson County, Illinois
Map of Illinois highlighting Stephenson County
Location in the state of Illinois
Map of the U.S. highlighting Illinois
Illinois's location in the U.S.
Founded 1837
Seat Freeport
Largest city Freeport
 - Total
 - Land
 - Water

565 sq mi (1,463 km²)
564 sq mi (1,461 km²)
<1 sq mi (1 km²), 0.10%
 - (2000)
 - Density

87/sq mi (34/km²)
Time zone Central: UTC-6/-5

Stephenson County is a county located in the U.S. state of Illinois. As of 2000, the population was 48,979. Its county seat is Freeport6.


According to the U.S. Census Bureau, the county has a total area of 1,463 km² (565 sq mi). 1,461 km² (564 sq mi) of it is land and 1 km² (1 sq mi) of it (0.10%) is water.

Adjacent Counties[]


Stephenson County was formed in 1837 out of Jo Daviess and Winnebago Counties. The County was named for Colonel Benjamin Stephenson, an official of the Illinois Territory.


As of the census² of 2000, there were 48,979 people, 19,785 households, and 13,473 families residing in the county. The population density was 34/km² (87/sq mi). There were 21,713 housing units at an average density of 15/km² (38/sq mi). The racial makeup of the county was 89.29% White, 7.68% Black or African American, 0.15% Native American, 0.68% Asian, 0.04% Pacific Islander, 0.63% from other races, and 1.53% from two or more races. 1.53% of the population were Hispanic or Latino of any race.

Historical populations
Census Pop.
1900 34,933
1910 36,821 5.4%
1920 37,743 2.5%
1930 40,064 6.1%
1940 40,646 1.5%
1950 41,595 2.3%
1960 46,207 11.1%
1970 48,861 5.7%
1980 49,536 1.4%
1990 48,052 −3.0%
2000 48,979 1.9%
IL Counties 1900-1990

There were 19,785 households out of which 30.70% had children under the age of 18 living with them, 55.40% were married couples living together, 9.50% had a female householder with no husband present, and 31.90% were non-families. 27.60% of all households were made up of individuals and 12.60% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.97.

In the county the population was spread out with 25.20% under the age of 18, 7.60% from 18 to 24, 27.50% from 25 to 44, 23.30% from 45 to 64, and 16.40% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 93.10 males. For every 100 females age 18 and over, there were 90.30 males.

The median income for a household in the county was $40,366, and the median income for a family was $48,510. Males had a median income of $36,300 versus $24,238 for females. The per capita income for the county was $19,794. About 6.50% of families and 9.00% of the population were below the poverty line, including 11.60% of those under age 18 and 8.50% of those age 65 or over.


A northerly look across Stephenson County's western edge from an overlook near Kent.

Cities and towns[]


External links[]

Coordinates: 42°21′N 89°40′W / 42.35, -89.67

This page uses content from the English language Wikipedia. The original content was at Stephenson County, Illinois. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.