File:Polk_County_Courthouse;_Des_Moines,_Iowa;_July_2,_2013.JPG · Wikimedia Commons · See Wikimedia Commons
Polk County
Sign in to saveAlso known as Polk County, Iowa, Polk County, IA
county in Iowa, United States
Key facts
- 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
- Total
- 591.888 sq mi (1,532.98 km )
- Land
- 572.720 sq mi (1,483.34 km )
- Water
- 19.168 sq mi (49.64 km ) 3.24%
- Estimate 2025
- 516,546
- Density
- 859.759/sq mi (331.955/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district
- 3rd
- Website
- polkcountyiowa.gov
via Wikipedia infobox
Wikidata facts
- Named after
- James K. Polk
- Country
- United States
- Located in
- Iowa
- Contains
- Polk City
- Capital
- Des Moines
- Population
- 492401
- Area
- 1533
- Elevation
- 279
- Shares border with
- Madison County
- Official website
- www.polkcountyiowa.gov
- Image
- Polk County Courthouse.jpg
- Households
- 191125
Show 8 more facts
- Commons category
- Polk County, Iowa
- topic's main category
- Category:Polk County, Iowa
- inception
- 1846-00-00
- category of associated people
- Category:People from Polk County, Iowa
- different from
- Polk County
- water as percent of area
- 3
- native label
- Polk County
- per capita income
- 36290
Sources (10)
via Wikidata · CC0
~10 min read
Encyclopedic overview
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 516,546 in 2025, 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.
History
Excerpted from Wikipedia’s “Polk County” article, available under the CC BY-SA 4.0 licence.