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Polk County, Iowa



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Polk County, Iowa
Map
Map of Iowa highlighting Polk County
Location in the state of Iowa
Map of the USA highlighting Iowa
Iowa's location in the U.S.
Statistics
Founded 1846
Seat Des Moines
Area
 - Total
 - Land
 - Water

591.90 sq mi (1,533 km²)
569.35 sq mi (1,475 km²)
22.55 sq mi (58 km²), 3.81%
Population
 - (2010)
 - Density

430,640
756/sq mi (292/km²)
Time zone Central: UTC-6/-5
Website: www.polkcountyiowa.gov
Named for: President Polk
Population [1]

Polk County is a county in the U.S. state of Iowa. As of the 2010 census, 430,640 people lived there. It the most populous county in Iowa.[1][2] The county seat is Des Moines,[3]. Des Moines is also the capital city of Iowa. Polk County is one of the five counties that make up the Des Moines-West Des Moines Metropolitan Statistical Area.[4]

History

Polk County was formed on January 13, 1846. It was named after President James K. Polk. The first courthouse was built in 1846. Construction of a second courthouse was begun in 1858. It was finished in 1866.

Geography

Historical populations
Census Pop.
18504,513
186011,625157.6%
187027,857139.6%
188042,39552.2%
189065,41054.3%
190082,62426.3%
1910110,43833.7%
1920154,02939.5%
1930172,83712.2%
1940195,83513.3%
1950226,01015.4%
1960266,31517.8%
1970286,1017.4%
1980303,1706.0%
1990327,1407.9%
2000374,60114.5%
2010430,64015.0%
Iowa Data Center[2]

The county has a total area of 591.90 square miles (1,533.0 km2). Of this, 569.35 square miles (1,474.6 km2) (or 96.19%) is land and 22.55 square miles (58.4 km2) (or 3.81%) is water.[5] The county is bisected by the Des Moines River


Adjacent counties

Communities

Cities

Unincorporated communities

References

Other websites

Coordinates: 41°41′06″N 93°34′13″W / 41.685°N 93.57028°W / 41.685; -93.57028