Pleasant Hill is a city in Polk County, Iowa, United States. The population was 10,147 at the time of the 2020 census. It is part of the Des Moines metropolitan area. As of July 2005, Pleasant Hill was assigned a ZIP code, 50327.

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.