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Clark County, Illinois


Clark County, Illinois

Clark County, Illinois
Clark County Courthouse in Marshall
Map of Illinois highlighting Clark County
Location in the state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded 1819
Named for George Rogers Clark
Seat Marshall
Largest city Marshall
 • Total 505 sq mi (1,308 km2)
 • Land 501 sq mi (1,298 km2)
 • Water 3.4 sq mi (9 km2), 0.7%
 • (2010) 16,335
 • Density 33/sq mi (13/km²)
Congressional district 15th
Time zone Central: UTC-6/-5
Website .org.clarkcountyilwww

Clark County is a

  • Clark County, Illinois History and Genealogy

External links

  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved July 4, 2014. 
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  3. ^ a b Perrin, p. 237
  4. ^ "Illinois County Boundaries 1790 - Present." Hebert, Michael H. Retrieved June 17, 2014.
  5. ^ Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 82. 
  6. ^ "Welcome to Clark County, Illinois, Genealogy and History." Retrieved June 10, 2014.
  7. ^ a b "Population, Housing Units, Area, and Density: 2010 - County".  
  8. ^ a b "Monthly Averages for Marshall, Illinois". The Weather Channel. Retrieved 2011-01-27. 
  9. ^ "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2014". Retrieved June 4, 2015. 
  10. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved July 4, 2014. 
  11. ^ "Historical Census Browser". University of Virginia Library. Retrieved July 4, 2014. 
  12. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 4, 2014. 
  13. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved July 4, 2014. 
  14. ^ a b c "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data".  
  15. ^ "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates".  
  16. ^ "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates".  
  • United States Census Bureau 2007 TIGER/Line Shapefiles
  • United States Board on Geographic Names (GNIS)
  • United States National Atlas


  • Perrin, William Henry, ed.. History of Crawford and Clark Counties, Illinois Chicago, Illinois. O. L. Baskin & Co. (1883).


See also

Clark County is divided into fifteen townships:


Unincorporated communities




See List of school districts in Clark County

There are three school districts in Clark County (Marshall, Martinsville and Casey-Westfield) with a total enrollment (2004) of 3,014 students. Each district has one high school (grades 9-12) and one junior high school (grades 7-8). Marshall has two elementary schools and the other districts have one each.


The median income for a household in the county was $43,597 and the median income for a family was $52,689. Males had a median income of $39,385 versus $27,426 for females. The per capita income for the county was $23,173. About 7.6% of families and 10.9% of the population were below the poverty line, including 15.3% of those under age 18 and 9.8% of those age 65 or over.[16]

Of the 6,782 households, 30.3% had children under the age of 18 living with them, 53.5% were married couples living together, 9.7% had a female householder with no husband present, 32.3% were non-families, and 27.7% of all households were made up of individuals. The average household size was 2.38 and the average family size was 2.87. The median age was 42.3 years.[14]

As of the 2010 United States Census, there were 16,335 people, 6,782 households, and 4,593 families residing in the county.[14] The population density was 32.6 inhabitants per square mile (12.6/km2). There were 7,772 housing units at an average density of 15.5 per square mile (6.0/km2).[7] The racial makeup of the county was 98.1% white, 0.3% black or African American, 0.3% Asian, 0.2% American Indian, 0.3% from other races, and 0.7% from two or more races. Those of Hispanic or Latino origin made up 1.1% of the population.[14] In terms of ancestry, 27.4% were German, 14.2% were Irish, 14.2% were English, and 10.8% were American.[15]

2000 census age pyramid for Clark County


In recent years, average temperatures in the county seat of Marshall have ranged from a low of 16 °F (−9 °C) in January to a high of 86 °F (30 °C) in July, although a record low of −23 °F (−31 °C) was recorded in January 1930 and a record high of 109 °F (43 °C) was recorded in July 1936. Average monthly precipitation ranged from 2.23 inches (57 mm) in January to 4.43 inches (113 mm) in July.[8]

Marshall, Illinois
Climate chart ()
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel[8]

Climate and weather

Major highways

Adjacent counties

According to the U.S. Census Bureau, the county has a total area of 505 square miles (1,310 km2), of which 501 square miles (1,300 km2) is land and 3.4 square miles (8.8 km2) (0.7%) is water.[7] Part of the county's eastern border is defined by the Wabash River. The North Fork of the Embarras River and Hurricane Creek are the main streams in western Clark County. Other than the Wabash River, Big Creek is the major stream in the eastern part of the county.[3]


The county seat was located in Darwin Township in 1823. A county-wide election was held In 1839 to determine whether Auburn or Marshall would be designated as the new seat. Marshall won the election and has remained the county seat since then.[6]

. Revolutionary War from the British during the Northwest Territory that captured the Virginia), an officer of the army of Lewis and Clark Expedition of the William Clark (older brother of [5] Clark County was named for

Clark County was formed in 1819 out of Crawford County. At the time of its formation, Clark County included about a third of Illinois, and extended as far north as the present state of Wisconsin. In 1821 the northern part of Clark County became part of the newly created Pike County on January 31, and the newly created Fayette County took the western part of Clark County on February 14. Edgar County was created from the northern part of Clark County on January 3, 1823. The creation of Coles County occupied additional land from western Clark County, effective December 25, 1830.[4] The boundaries of Clark County have been unchanged since.



  • History 1
  • Geography 2
    • Adjacent counties 2.1
    • Major highways 2.2
  • Climate and weather 3
  • Demographics 4
  • Education 5
  • Communities 6
    • Cities 6.1
    • Village 6.2
    • Unincorporated communities 6.3
    • Townships 6.4
  • See also 7
  • Sources 8
  • References 9
  • External links 10


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