Hancock County, Illinois

Hancock County hugs the Mississippi River in western Illinois. Carthage is the county seat, but Nauvoo is the town with the real history. In fact, it was once a major Mormon settlement.

The county has more shoreline than you’d expect in Illinois, thanks to the big river. Farming is the main gig, but there’s some industry too. You’ll see plenty of old barns and silos scattered across the landscape.

The Nauvoo Temple stands out like a sore thumb. It’s massive compared to everything else around it. The county fair is still a big deal every summer. People here are proud of their river heritage.

CategoryDetails
County NameHancock County
County SeatCarthage
EtymologyNamed after John Hancock, the first signer of the Declaration of Independence
Cities, Towns, and CommunitiesCarthage, Hamilton, Nauvoo, Warsaw, Augusta, La Harpe, Dallas City, Ferris, Elvaston, Plymouth, West Point, and various other unincorporated communities.
Interstates and HighwaysU.S. Highway 136, Illinois Route 9, Illinois Route 96, Illinois Route 94, Illinois Route 61
FIPS Code17-067
Total Area (Land and Water)814 square miles (land: 794 sq mi, water: 20 sq mi)
Adjacent Counties (and Direction)Lee County, Iowa (Northwest), Henderson County (Northeast), McDonough County (East), Schuyler County (Southeast), Adams County (South), Lewis County, Missouri (Southwest), Clark County, Missouri (West)
Time ZoneCentral Time Zone (CT)
PopulationApproximately 17,500
StateIllinois
Coordinates40.4025° N, 91.1320° W
Major LandmarksNauvoo Historic District, Carthage Jail, Hancock County Courthouse, Warsaw Brewery, Riverfront Park
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