Mason County | |
|---|---|
 Mason County Courthouse, Havana | |
 Location within the U.S. state of Illinois | |
 Illinois's location within the U.S. | |
| Coordinates: 40°14′N 89°55′W / 40.24°N 89.91°W | |
| Country |  United States |
| State |  Illinois |
| Founded | 1841 |
| Named for | George Mason |
| Seat | Havana |
| Largest city | Havana |
| Area | |
• Total | 563 sq mi (1,460 km2) |
| • Land | 539 sq mi (1,400 km2) |
| • Water | 24 sq mi (60 km2) 4.3% |
| Population (2020) | |
• Total | 13,086 |
• Estimate (2021) | 12,881 |
| • Density | 23/sq mi (9.0/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 15th |
| Website | www |
Mason County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 13,086.[1] Its county seat is Havana.[2] The county is named in honor of George Mason, a member of the Virginia legislature who campaigned for the adoption of the United States Bill of Rights.
- ^ "QuickFacts". United States Census Bureau. Retrieved January 23, 2023.
- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.