Oskaloosa Flag

Oskaloosa

County:
Mahaska County
County Seat:
Yes
Area (mi²):
8.05
State:
Iowa

Oskaloosa is a city located in Mahaska County, Iowa. Oskaloosa has a 2026 population of 11,575. It is also the county seat of Mahaska County. Oskaloosa is currently growing at a rate of 0.43% annually and its population has increased by 0.29% since the most recent census, which recorded a population of 11,542 in 2020.

11.6K
Total Population
1,438
Density (mi²)
50 0.43%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)