Illinois Counties
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Illinois Counties

There are one hundred and two counties in Illinois. St. Clair County was the first county established in what is today Illinois. Most counties in Illinois were named after early American leaders, especially of the American Revolutionary War, as well as soldiers from the Battle of Tippecanoe and the War of 1812.

Morgan County, Illinois

Morgan County Education, Geography, and HistoryMorgan County, Illinois Courthouse

Morgan County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 35,547. Morgan County was created on January 31, 1823. The county seat is Jacksonville. The county is named for General Daniel Morgan (1736-1802), successful tactician in the American Revolutionary War and later United States Representative from Virginia.

Morgan County is part of the Jacksonville, IL Micropolitan Statistical Area, which is also included in the Springfield-Jacksonville-Lincoln, IL Combined Statistical Area.

Etymology - Origin of County Name

The county is named for General Daniel Morgan, who earned distinction during the American Revolution at Quebec and Saratoga.


County QuickFacts: CensusBureau Quick Facts

County History

Morgan County was created on January 31, 1823 (Laws, 1823, p. 108.) and was formed from unorganized land (Greene County ) and Sangamon County. Present area, or parts of it, formerly included in: County Greene County (1821-1823), Madison County (1812-1821) and St. Clair County (1790-1812).

The County was named for Daniel Morgan, a General of the Revolution, who, as commander of the "Rifle Brigade," served with distinction at Quebec, Saratoga, the Cowpens, and other important engagements. The County Seat is Jacksonville. Prior County Seats was Olmstead's Mounds- Temporary designation (1823-1825) and Jacksonville (1825-Present).

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 572 square miles (1,482 km2), of which, 569 square miles (1,473 km2) of it is land and 4 square miles (9 km2) of it (0.61%) is water.

Morgan county is located close to the center of Illinois. Part of Meredosia National Wildlife Refuge is located in this county.

Neighboring Counties

Bordering counties are as follows:

  • North: Cass County
  • East: Sangamon County
  • Southeast: Macoupin County
  • Southwest: Greene County; Scott County
  • West: Pike County
  • Northwest: Brown County


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