Hancock County | |
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![]() Hancock County Courthouse in Carthage | |
![]() Location within the U.S. state of Illinois | |
![]() Illinois's location within the U.S. | |
Coordinates: 40°24′N 91°10′W / 40.4°N 91.17°W | |
Country | ![]() |
State | ![]() |
Founded | 1825 |
Named for | John Hancock |
Seat | Carthage |
Largest city | Hamilton |
Area | |
• Total | 814 sq mi (2,110 km2) |
• Land | 794 sq mi (2,060 km2) |
• Water | 21 sq mi (50 km2) 2.5% |
Population (2020) | |
• Total | 17,620 |
• Density | 22/sq mi (8.4/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional district | 15th |
Website | www |
Hancock County is a county in the U.S. state of Illinois. According to the 2020 census, it has a population of 17,620.[1] Its county seat is Carthage,[2] and its largest city is Hamilton. The county is composed of rural towns with many farmers.
Hancock County is part of the Fort Madison-Keokuk, IA-IL-MO Micropolitan Statistical Area.