Mitchellville is a city located in Polk and Jasper counties in the U.S. state of Iowa. The population was 2,485 at the time of the 2020 census.

Polk County is located in the U.S. state of Iowa. As of the 2020 census, the population was 492,401. It is Iowa's most populous county, and home to over 15% of the state's residents. The county seat is Des Moines, which is also the capital city of Iowa. Polk County is included in the Des Moines–West Des Moines, IA Metropolitan Statistical Area.