Some of the cities, towns, and places in Polk County are Alleman, Allen, Altoona, Ankeny, Avon, Beaver, Berwick, Bloomfield, Bondurant, Camp, Carlisle, Clay, Clive, Crocker, Delaware, Des Moines, Douglas, Elkhart, Enterprise, Farrar, Four Mile, Franklin, Granger, Grimes, Herrold, Jefferson, Johnston, Lee, Lincoln, Madison, Mitchellville, Norwalk, Pleasant Hill, Polk City, Runnells, Saylor, Saylorville, Sheldahl, Union, Urbandale, Walnut, Washington, Webster, West Des Moines, Windsor Heights
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.