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Williamson County
Sign in to saveAlso known as Williamson County, Illinois, Williamson County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Founded
- February 28, 1839
- Named after
- Williamson County, Tennessee
- Seat
- Marion
- Largest city
- Marion
- Total
- 444 sq mi (1,150 km )
- Land
- 420 sq mi (1,100 km )
- Water
- 24 sq mi (62 km ) 5.4%
- Estimate 2025
- 67,225
- Density
- 160/sq mi (62/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district
- 12th
- Website
- www .williamsoncountyil .gov
via Wikipedia infobox
Official website

Home - Williamson County
williamsoncountyil.gov →Link to the official site · 4,244 chars · not written by Vinony
~11 min read
Encyclopedic overview
Williamson County is a county in Illinois. At the 2020 census, it had a population of 67,153. Its largest city and county seat is Marion. Williamson County is part of the Metro Lakeland area of Southern Illinois.
History
Excerpted from Wikipedia’s “Williamson County” article, available under the CC BY-SA 4.0 licence.