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Marshall County, Illinois
Map of Illinois highlighting Marshall County
Location in the state of Illinois
Map of the U.S. highlighting Illinois
Illinois's location in the U.S.
Founded 1839
Seat Lacon
Largest city Henry
 - Total
 - Land
 - Water

399 sq mi (1,032 km²)
386 sq mi (1,000 km²)
12 sq mi (32 km²), 3.12%
 - (2000)
 - Density

34/sq mi (13/km²)
Time zone Central: UTC-6/-5

Marshall County is a county located in the U.S. state of Illinois. As of 2000, the population is 13,180. Its county seat is Lacon6.


According to the U.S. Census Bureau, the county has a total area of 1,032 km² (399 sq mi). 1,000 km² (386 sq mi) of it is land and 32 km² (12 sq mi) of it (3.12%) is water.

Adjacent Counties[]


Marshall County was formed in 1839 out of Putnam County. It was named in honor of John Marshall, Chief Justice of the United States Supreme Court, who died in 1835.


As of the census2 of 2000, there were 13,180 people, 5,225 households, and 3,720 families residing in the county. The population density was 13/km² (34/sq mi). There were 5,914 housing units at an average density of 6/km² (15/sq mi). The racial makeup of the county was 98.19% White, 0.35% Black or African American, 0.22% Native American, 0.25% Asian, 0.01% Pacific Islander, 0.25% from other races, and 0.74% from two or more races. 1.05% of the population were Hispanic or Latino of any race.

There were 5,225 households out of which 29.60% had children under the age of 18 living with them, 60.80% were married couples living together, 6.70% had a female householder with no husband present, and 28.80% were non-families. 25.00% 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 2.47 and the average family size was 2.95.

In the county the population was spread out with 23.50% under the age of 18, 7.20% from 18 to 24, 25.60% from 25 to 44, 24.90% from 45 to 64, and 18.80% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 96.00 males. For every 100 females age 18 and over, there were 94.70 males.

Historical populations
Census Pop.
1900 16,370
1910 15,679 −4.2%
1920 14,760 −5.9%
1930 13,023 −11.8%
1940 13,179 1.2%
1950 13,025 −1.2%
1960 13,334 2.4%
1970 13,302 −0.2%
1980 14,479 8.8%
1990 12,846 −11.3%
2000 13,180 2.6%
IL Counties 1900-1990

The median income for a household in the county was $41,576, and the median income for a family was $48,061. Males had a median income of $35,765 versus $21,452 for females. The per capita income for the county was $19,065. About 3.80% of families and 5.60% of the population were below the poverty line, including 6.90% of those under age 18 and 5.40% of those age 65 or over.

Cities and towns[]

Census designated places[]

Coordinates: 41°02′N 89°20′W / 41.03, -89.34

This page uses content from the English language Wikipedia. The original content was at Marshall 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.