Marshall County, Iowa

Marshall County
Marshall County
County
	The courthouse in Marshalltown is on the NRHP
	Location within the U.S. state of Iowa
	Iowa's location within the U.S.
	Coordinates: 42°02′03″N 93°00′04″W / 42.034166666667°N 93.001111111111°W
Country	United States
State	Iowa
Founded	1846
Named for	John Marshall
Seat	Marshalltown
Largest city	Marshalltown
Area
• Total	573 sq mi (1,480 km2)
• Land	572 sq mi (1,480 km2)
• Water	0.7 sq mi (2 km2) 0.1%
Population (2020)
• Total	40,105
• Estimate (2023)	40,014
• Density	70/sq mi (27/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	1st
Website	www.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]

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