Marshall County

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

county in Iowa, United States

Key facts

Country: United States
State: Iowa
Founded: January 13, 1846
Named after: John Marshall
Seat: Marshalltown
Largest city: Marshalltown
Total: 573.199 sq mi (1,484.58 km )
Land: 572.503 sq mi (1,482.78 km )
Water: 0.696 sq mi (1.80 km ) 0.12%
Estimate 2025: 39,890
Density: 70.052/sq mi (27.047/km )
Time zone: UTC−6 ( Central )
Summer dst: UTC−5 ( CDT )
Congressional district: 1st
Website: marshallcountyia.gov

via Wikipedia infobox

Wikidata facts

Official name: Marshall County
Population: 40105
Area: 1484
Official website: www.co.marshall.ia.us
Image: Marshall County Courthouse DH.jpg
Households: 15388

Show 5 more facts

Commons category: Marshall County, Iowa
inception: 1846-00-00
water as percent of area: 0.1
native label: Marshall County
per capita income: 28152

Sources (10)

via Wikidata · CC0

~7 min read

Article

Marshall County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 40,105, and was estimated to be 39,890 in 2025. The county seat and largest city is Marshalltown. The county was formed on January 13, 1846, and named after John Marshall, Chief Justice of the United States Supreme Court. Marshall County comprises the Marshalltown, Iowa Micropolitan Statistical Area. In 2010, the center of population of Iowa was located in Marshall County, near Melbourne.

Geography