|Name origin: Mclean|
|Area||2.74 sq mi (7 km2)|
|- land||2.61 sq mi (7 km2)|
|- water||0.13 sq mi (0 km2)|
|Density||1,286.3 / sq mi (497 / km2)|
|- summer (DST)||CDT (UTC-5)|
|Wikimedia Commons: McLeansboro, Illinois|
McLeansboro is part of the Mount Vernon, Illinois micropolitan area.
McLeansboro is located at (38.093115, -88.536213).
According to the 2010 census, the city has a total area of 2.74 square miles (7.1 km2), of which 2.61 square miles (6.8 km2) (or 95.26%) is land and 0.13 square miles (0.34 km2) (or 4.74%) is water.
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As of the census of 2000, there were 2,945 people, 1,265 households, and 747 families residing in the city. The population density was 1,286.3 people per square mile (496.5/km²). There were 1,444 housing units at an average density of 630.7/sq mi (243.5/km²). The racial makeup of the city was 98.10% White, 0.78% African American, 0.03% Native American, 0.20% Asian, 0.03% Pacific Islander, 0.17% from other races, and 0.68% from two or more races. Hispanic or Latino of any race were 0.37% of the population.
There were 1,265 households out of which 26.0% had children under the age of 18 living with them, 44.6% were married couples living together, 11.1% had a female householder with no husband present, and 40.9% were non-families. 38.4% of all households were made up of individuals and 23.9% had someone living alone who was 65 years of age or older. The average household size was 2.19 and the average family size was 2.91.
In the city the population was spread out with 22.8% under the age of 18, 8.3% from 18 to 24, 22.7% from 25 to 44, 20.6% from 45 to 64, and 25.7% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 81.3 males. For every 100 females age 18 and over, there were 74.4 males.
The median income for a household in the city was $22,183, and the median income for a family was $35,296. Males had a median income of $35,114 versus $18,125 for females. The per capita income for the city was $15,354. About 11.9% of families and 19.7% of the population were below the poverty line, including 34.7% of those under age 18 and 8.6% of those age 65 or over.
- Ray Blades, baseball player.
- Jim Burns, former U.S.Attorney, Inspector General for the Illinois Secretary of State since 2000.
- Christen Craig, news reporter.
- Carl Mauck, former center for the Houston Oilers and National Football League.
- Jerry Sloan, former basketball player and head coach for the Chicago Bulls and former head coach of the Utah Jazz.
- H. Allen Smith, author.
- John H. Stelle, Illinois politician
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "2010 Census U.S. Gazetteer Files for Places – Illinois". United States Census. Retrieved 2012-10-13.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- History of Southern Illinois, George Washington Smith, 1912.