Marshall County, Iowa

Marshall County
County
The courthouse in Marshalltown is on the NRHP
The courthouse in Marshalltown is on the NRHP
Map of Iowa highlighting Marshall County
Location within the U.S. state of Iowa
Map of the United States highlighting Iowa
Iowa's location within the U.S.
Coordinates: 42°02′03″N 93°00′04″W / 42.034166666667°N 93.001111111111°W / 42.034166666667; -93.001111111111
Country United States
State Iowa
Founded1846
Named forJohn Marshall
SeatMarshalltown
Largest cityMarshalltown
Area
 • Total
573 sq mi (1,480 km2)
 • Land572 sq mi (1,480 km2)
 • Water0.7 sq mi (2 km2)  0.1%
Population
 (2020)
 • Total
40,105
 • Estimate 
(2023)
40,014 Decrease
 • Density70/sq mi (27/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district1st
Websitewww.marshallcountyia.gov

Marshall County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 40,105.[1] The county seat and largest city is Marshalltown.[2] The county was formed on January 13, 1846, and named after John Marshall, Chief Justice of the United States Supreme Court.[3] Marshall County comprises the Marshalltown, Iowa Micropolitan Statistical Area. In 2010, the center of population of Iowa was located in Marshall County, near Melbourne.[4]

  1. ^ "2020 Census State Redistricting Data". census.gov. United states Census Bureau. Retrieved August 12, 2021.
  2. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
  3. ^ "Courthouse History—Marshall County, Iowa". Archived from the original on October 29, 2018. Retrieved January 20, 2008.
  4. ^ "Centers of Population by State: 2010". United States Census Bureau. Retrieved July 20, 2014.