Jefferson County is named for Thomas Jefferson, who was President of the United States from 1801 to 1809.
Surrounding County Courthouses:
N – Atchison County
S – Douglas County and Shawnee County
W – Shawnee County and Jackson County
Created: August 30, 1855 
County Seat:
Oskaloosa 1855 – present
County Courthouse – Oskaloosa
Location: 300 Jefferson Street / Liberty Street
Built: 1896 – 1897
Style: Modern
Architect: Kiene and Bradley and Associates
Contractor: J A Lundgren & Sons
Description: The building faces south and is a two story red colored brick and concrete structure. The building is located on spacious landscaped grounds in the center of Oskaloosa. The south front has a central entrance on the first story with glass panels and small over hanging canopy. Six blue vertical pillars run along the building. A horizontal concrete band divides the first and second stories. The roof line is flat. The building was remodeled in 1988. The architect was Ossmann & Associates and the contractor was Tefft & Donaldson Contractors.
See: The architect, Kiene & Bradley Architects of Topeka, designed courthouses in Coffey County, Greeley County, Logan County, Morris County, Neosho County and Wilson County.
History: The previous courthouse was designed by E D Baldwin and constructed by Graham & Swain in 1868. The building was damaged by a tornado in 1960 a
History: The first courthouse was a two story structure designed by E D Baldwin and constructed by Grisham & Swain in Oskaloosa in 1868. The courthouse was destroyed by a tornado in 1960 and subsequently demolished. The second and present courthouse was constructed in 1961 to 1962.
County Courthouse - Oskaloosa
Photos taken 2010