Polk County, Iowa
Polk County, Iowa | |
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The Polk County Courthouse in Des Moines | |
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Flag Seal | |
Location within the U.S. state of Iowa | |
| Coordinates: 41°41′05″N 93°34′08″W / 41.684816°N 93.568971°W | |
| Country | United States |
| State | Iowa |
| Founded | January 13, 1846 (created) March 1, 1846 (organized) |
| Named after | James K. Polk |
| Seat | Des Moines |
| Largest city | Des Moines |
| Area | |
• Total | 591.888 sq mi (1,532.98 km2) |
| • Land | 572.720 sq mi (1,483.34 km2) |
| • Water | 19.168 sq mi (49.64 km2) 3.24% |
| Population (2020) | |
• Total | 492,401 |
• Estimate (2024) | 516,185 |
| • Density | 859.759/sq mi (331.955/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Area code | 515 |
| Congressional district | 3rd |
| Website | polkcountyiowa.gov |
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Polk County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 492,401, and was estimated to be 516,185 in 2024, making it the most populous county in Iowa. The county seat and the largest city 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.