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File:Iowa_County_Courthouse,_Marengo.jpg · Wikimedia Commons · See Wikimedia Commons

EntityQ486000· pop 46· linked from 416 articles

Iowa County

Also known as Iowa County, Iowa, Iowa County, IA

county in Iowa, United States of America

Key facts

Country: United States
State: Iowa
Founded: February 17, 1843 (created), July 1, 1845 (organized)
Named after: Iowa River
Seat: Marengo
Largest city: Williamsburg
Total: 587.492 sq mi (1,521.60 km )
Land: 586.455 sq mi (1,518.91 km )
Water: 1.037 sq mi (2.69 km ) 0.18%
Estimate 2025: 16,504
Density: 28.411/sq mi (10.970/km )
Time zone: UTC−6 ( Central )
Summer dst: UTC−5 ( CDT )
Congressional district: 1st
Website: iowacounty.iowa.gov

via Wikipedia infobox

Wikidata facts

Population: 16662
Area: 1521
Official website: www.co.iowa.ia.us
Image: Iowa County Courthouse, Marengo.jpg
Households: 6646

Show 5 more facts

Commons category: Iowa County, Iowa
inception: 1843-00-00
water as percent of area: 0.2
native label: Iowa County
per capita income: 33910

Sources (9)

via Wikidata · CC0

~9 min read

Article

Iowa County is a county in the U.S. state of Iowa. As of the 2020 census, the population was 16,662, and was estimated to be 16,504 in 2025. The county seat is Marengo and the largest city is Williamsburg. Iowa County is one of seven counties in the United States to share the same name as the state in which they are located. The other six counties are Arkansas County, Hawaii County, Idaho County, New York County, Oklahoma County, and Utah County.

History