Skip to content
Home » US States » H-L » Iowa » Mahaska County

Mahaska County


Mahaska County is named for Chief Mahaska, who was a chief of the Ioway Native American tribe.


Surrounding County Courthouses: 

N – Jasper County and Poweshiek County

E – Keokuk County 

S – Wapello County and Monroe County

W – Marion County   


Created:  February 17, 1843                  Map of Iowa highlighting Mahaska County

County Seat:

Oskaloosa  1844 – present


County Courthouse – Oskaloosa


Location:  106 South 1st Street / High Avenue East

Built:  1882 – 1886

Style:  Romanesque

Architect:  H C Koch and Company of Milwaukee, Wisconsin

Contractor:  O J King & Company


Description: The building faces west and is a three story red colored brick and stone structure. The building is located on landscaped grounds in the center of Oskaloosa and has a stone foundation. The west front has a large stone arch around the first story entrance. Above rises a square brick tower which is tired having a square clock tower with spires at the top. The roof line has peaked dormers with arched windows. Stone trim horizontal bands run along the building. The building houses the County District Court of the 8A Judicial District.


Note: The architect, H C Koch and Company of Milwaukee, Wisconsin, designed courthouses in Jefferson County, Montgomery County and Webster County and in Marshall County, Kansas


See:  The 8A Judicial District includes Appanoose County, Davis CountyJefferson CountyKeokuk CountyMonroe CountyPoweshiek County, Van Buren CountyWapello County and Washington County.


History:  The county was created in 1843 and Oskaloosa was selected as the county seat in 1844. The first courthouse was built in 1844 to 1845. The second and present courthouse was constructed in 1882 to 1886 at a cost of $132,500.



County Courthouse – Oskaloosa  



Photos taken 2008