Richland County | |
---|---|
![]() Richland County Courthouse in Olney | |
![]() Location within the U.S. state of Illinois | |
![]() Illinois's location within the U.S. | |
Coordinates: 38°43′N 88°05′W / 38.71°N 88.09°W | |
Country | ![]() |
State | ![]() |
Founded | February 24, 1841 |
Named for | Richland County, Ohio |
Seat | Olney |
Largest city | Olney |
Area | |
• Total | 362 sq mi (940 km2) |
• Land | 356 sq mi (920 km2) |
• Water | 1.9 sq mi (5 km2) 0.5% |
Population (2020) | |
• Total | 15,813 |
• Estimate (2021) | 15,796 |
• Density | 44/sq mi (17/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional district | 12th |
Richland County is a county located in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 15,813.[1] Its county seat is Olney.[2][3]: County Seats