Marshall 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 |
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.