Winnebago County is named for the Winnebago Native American tribe.
Surrounding County Courthouses:
N – Waupaca County and Outagamie County
E – Calumet County and Fond du Lac County
W – Green Lake County and Waushara County
Created: January 6, 1840 
County Seat:
Oshkosh 1840 – present
County Courthouse – Oshkosh
Location: 415 Jackson Street / Algoma Boulevard
Built: 1937 – 1939
Style: Art Deco
Architect: Frank L Venning of Granger & Bollenbacher, Architects of Chicago, Illinois
Contractor: Lundoff-Bicknell Company of Cleveland, Ohio
Description: The building faces southeast and is a three story limestone clad and concrete structure. The building is located on landscaped grounds in the center of Oshkosh, The windows on the second and third stories are a continuous long narrow vertical window. The southeast front has a recessed entrance bordered with designs in the stone trim. The building features massive granite steps and symbolic carvings in limestone that frame a bronze doorway. On the northwest side is an enclosed one story entrance section. In the interior, the rectangular shaped lobby is faced with pale mauve Portuguese marble along with gray colored French marble in the corridors. The floors are stripped with contrasting terrazzo divided by bronze seams. Edges of the plaster ceiling are worked into sharp compound moldings. A bronze compass enclosed by the county name prefaces the stairway. Bronze rail rise along the stairs. The County Circuit Courtrooms on the second story have a variety of wood in birch and rift-sawn oak. The main Circuit Court courtroom has copper-finish birch and American walnut. There are four County Circuit Court courtrooms.The building houses the County Circuit Court of the 4th Judicial Circuit. On the northwest side is the County Administration Building.
See: National Register of Historic Places – Winnebago County Courthouse
See: The 4th Judicial District includes Calumet County, Fond du Lac County, Green Lake County, Manitowoc County, Marquette County, Sheboygan County and Waushara County.
History: The county was created in 1840 and Oshkosh was selected as the county seat. The first courthouse was a two story brick structure built in 1860 at a cost of $19,689. An addition was designed by William Waters and constructed in 1909.The second and present courthouse was constructed in 1937 to 1939.
County Courthouse - Oshkosh
County Circuit Court courtroom
County Administration Building – Oshkosh
Photos taken 2007 and 2022