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Union County, Illinois
Map of Illinois highlighting Union County
Location in the state of Illinois
Map of the U.S. highlighting Illinois
Illinois's location in the U.S.
Founded 1818
Seat Jonesboro
Largest city Anna
 - Total
 - Land
 - Water

422 sq mi (1,093 km²)
416 sq mi (1,078 km²)
6 sq mi (15 km²), 1.41%
 - (2000)
 - Density

44/sq mi (17/km²)
Time zone Central: UTC-6/-5

Union County is a county located in the U.S. state of Illinois. As of the 2000 census, the population is 18,293. Its county seat is Jonesboro6.


According to the U.S. Census Bureau, the county has a total area of 1,093 km² (422 sq mi). 1,078 km² (416 sq mi) of it is land and 15 km² (6 sq mi) of it (1.41%) is water.

Adjacent Counties[]


Union County was formed out of Johnson County in 1818, the same year Illinois joined the Union.


Historical populations
Census Pop.
1900 22,610
1910 21,856 −3.3%
1920 20,249 −7.4%
1930 19,883 −1.8%
1940 21,528 8.3%
1950 20,500 −4.8%
1960 17,645 −13.9%
1970 16,071 −8.9%
1980 17,765 10.5%
1990 17,619 −0.8%
2000 18,293 3.8%
IL Counties 1900-1990

As of the census2 of 2000, there were 18,293 people, 7,290 households, and 4,971 families residing in the county. The population density was 17/km² (44/sq mi). There were 7,894 housing units at an average density of 7/km² (19/sq mi). The racial makeup of the county was 96.28% White, 0.82% Black or African American, 0.37% Native American, 0.28% Asian, 0.02% Pacific Islander, 1.19% from other races, and 1.04% from two or more races. 2.63% of the population were Hispanic or Latino of any race.

There were 7,290 households out of which 30.30% had children under the age of 18 living with them, 55.60% were married couples living together, 9.50% had a female householder with no husband present, and 31.80% were non-families. 28.40% of all households were made up of individuals and 14.90% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.93.

In the county the population was spread out with 23.20% under the age of 18, 7.50% from 18 to 24, 26.70% from 25 to 44, 25.10% from 45 to 64, and 17.50% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 94.50 males. For every 100 females age 18 and over, there were 91.90 males.

The median income for a household in the county was $30,994, and the median income for a family was $37,710. Males had a median income of $30,016 versus $22,305 for females. The per capita income for the county was $16,450. About 10.80% of families and 16.50% of the population were below the poverty line, including 19.80% of those under age 18 and 12.10% of those age 65 or over.

Cities and towns[]

Census designated place[]

External links[]

Coordinates: 37°28′N 89°16′W / 37.47, -89.26

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