O'Brien County, Iowa
| O'Brien County, Iowa | |
|---|---|
|
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 Location in the U.S. state of Iowa |
|
 Iowa's location in the U.S. |
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| Founded | 1851 |
| Named for | William Smith O'Brien |
| Seat | Primghar |
| Largest city | Sheldon |
| Area | |
| • Total | 573 sq mi (1,484 km2) |
| • Land | 573 sq mi (1,484 km2) |
| • Water | 0.2 sq mi (1 km2), 0.03% |
| Population | |
| • (2010) | 14,398 |
| • Density | 25/sq mi (10/km²) |
| Congressional district | 4th |
| Time zone | Central: UTC-6/-5 |
| Website | www |
O'Brien County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 14,398. The county seat is Primghar.
O'Brien County was founded in 1851. The county was named for William Smith O'Brien, a leader for Irish independence in 1848. The present courthouse was completed in 1917, and is listed on the National Register of Historic Places.
According to the U.S. Census Bureau, the county has a total area of 573 square miles (1,480 km2), of which 573 square miles (1,480 km2) is land and 0.2 square miles (0.52 km2) (0.03%) is water.
As of the census of 2010, there were 14,398 people, 6,069 households, and 3,927 families residing in the county. The population density was 25.1239/sq mi (9.7004/km2). There were 6,649 housing units at an average density of 11 per square mile (4/km²). The racial makeup of the county was 96.0% White, 0.5% Black or African American, 0.1% American Indian, 0.6% Asian, 2.0% from other races, and 0.8% from two or more races. The county has a 3.8% Hispanic or Latino background.
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