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Also known as Shelby County, Illinois, Shelby County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Named after
- Isaac Shelby
- Seat
- Shelbyville
- Largest city
- Shelbyville
- Total
- 768 sq mi (1,990 km )
- Land
- 759 sq mi (1,970 km )
- Water
- 9.5 sq mi (25 km ) 1.2%
- Estimate 2025
- 20,576
- Density
- 27.7/sq mi (10.7/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district