Mahaska County, Iowa

The Mahaska County is a county located in the U.S. state of Iowa. In the census in 2010, the County had 22 381 inhabitants and a population density of 15.1 inhabitants per square kilometer. The administrative headquarters ( County Seat) is Oskaloosa, named after the wife of the Indian chief Osceola.


The County is located in the central southeastern part of Iowa, and is drained by the Des Moines River. It has an area of 1,485 square kilometers, of which seven square kilometers of water surface. At the Mahaska County borders the following counties:


The Mahaska County was formed on February 17, 1843 on former Indian land. It was named after Mahaska (1784-1834), a chief of the Native American people of Iowa.

Under self-administration, it is since 5 February 1844., The County was the first in Iowa, which had a sheriff and a justice of the peace.

The first courthouse was completed in January 1846. The second was handed over to its February 27, 1886. The first school, a small wooden hut, about 2 kilometers east of Oskaloosa was opened on September 16, 1844 and 1846 was built the first church in the Cumberland Presbyterian Church. On July 2, 1850 the first issue of the Iowa Oskaloosa Herald Herald today appeared, and 1864, the first rails of the Des Moines Valley Railroad were laid through the county.

Demographic data

According to the census in 2010 lived in Mahaska County 22 381 people in 8,932 households. The population density was 15.1 inhabitants per square kilometer.

The racial the population was composed of 95.7 percent white, 1.1 percent African American, 0.3 percent Native American, 1.1 percent Asian and other ethnic groups; 1.1 percent were descended from two or more races. Regardless of ethnicity were 1.6 percent of the population are Hispanic or Latino of any race.

In the 8,932 households lived statistically 2.40 per person.

24.3 percent of the population were under 18 years old, 59.6 percent were between 18 and 64 and 16.1 percent were 65 years or older. 49.7 percent of the population was female.

The median income for a household was $ 45,021. The per capita income was $ 22,027. 13.0 percent of the population lived below the poverty line.

Places in Mahaska County


  • Barnes City1
  • Beacon
  • Eddyville2
  • Fremont
  • Keomah Village
  • Leighton
  • New Sharon
  • Oskaloosa
  • Rose Hill
  • University Park

Unincorporated communities

  • Cedar
  • Evans
  • Evans Junction
  • Lacey
  • Olivet
  • Taintor
  • Union Mills
  • Wright

1 - partially in Poweshiek County 2 - partially in Monroe and Wapello County


The Mahaska County is divided into 18 townships:

  • Adams Township
  • Black Oak Township
  • Cedar Township
  • East Des Moines Township
  • Garfield Township
  • Harrison Township
  • Jefferson Township
  • Lincoln Township
  • Madison Township
  • Monroe Township
  • Pleasant Grove Township
  • Prairie Township
  • Richland Township
  • Scott Township
  • Spring Creek Township
  • Union Township
  • West Des Moines Township
  • White Oak Township

The Stadtg Oskaloosa not belong to any Township.