File:Marion_County_Courthouse_in_Salem.jpg · Wikimedia Commons · See Wikimedia Commons
Marion County
Sign in to saveAlso known as Marion County, Illinois, Marion County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Named after
- Francis Marion
- Seat
- Salem
- Largest city
- Centralia
- Total
- 576 sq mi (1,490 km )
- Land
- 572 sq mi (1,480 km )
- Water
- 3.7 sq mi (9.6 km ) 0.6%
- Estimate 2025
- 36,382
- Density
- 66.0/sq mi (25.5/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district
- 15th
via Wikipedia infobox
Wikidata facts
- Population
- 37729
- Area
- 1481
- Official website
- marioncountyil.gov
- Image
- Marion County Courthouse in Salem.jpg
- Households
- 16126
Show 5 more facts
- Commons category
- Marion County, Illinois
- inception
- 1823-00-00
- water as percent of area
- 0.6
- native label
- Marion County
- per capita income
- 26853
Sources (8)
via Wikidata · CC0
~5 min read
Article
Marion County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 37,729. Its county seat is Salem. Marion County comprises the Centralia, IL Micropolitan Statistical Area, which is included in the St. Louis-St. Charles-Farmington, MO-IL Combined Statistical Area.
History
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Illinois
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United States Census Bureau
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St. Charles County
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list of municipalities in Illinois
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