Mercer County | |
---|---|
Coordinates: 41°12′N 90°44′W / 41.2°N 90.74°W | |
Country | United States |
State | Illinois |
Founded | January 13, 1825 |
Named for | Hugh Mercer |
Seat | Aledo |
Largest city | Aledo |
Area | |
• Total | 569 sq mi (1,470 km2) |
• Land | 561 sq mi (1,450 km2) |
• Water | 7.5 sq mi (19 km2) 1.3% |
Population (2020) | |
• Total | 15,699 |
• Estimate (2021) | 15,582 |
• Density | 28/sq mi (11/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional districts | 15th, 17th |
Website | www |
Mercer County is a county in Illinois. According to the 2020 census, it had a population of 15,699.[1] Its county seat is Aledo.[2]
Mercer County is included in the Davenport-Moline-Rock Island, IA-IL Metropolitan Statistical Area.[3]