Franklin County
Also known as Franklin County, Illinois, Franklin County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Founded
- January 2, 1818
- Named after
- Benjamin Franklin
- Seat
- Benton
- Largest city
- West Frankfort
- Total
- 432 sq mi (1,120 km )
- Land
- 409 sq mi (1,060 km )
- Water
- 23 sq mi (60 km ) 5.2%
- Estimate 2025
- 36,916
- Density
- 92.4/sq mi (35.7/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
~8 min read
Article
Franklin County is a county in Southern Illinois. At the 2020 census, it had a population of 37,804. The largest city is West Frankfort and the county seat is Benton. Franklin County is located in the Metro Lakeland area of Southern Illinois.
History