Viroqua is the county seat of Vernon County, Wisconsin, United States. The population was 5,079 at the 2010 census. The city is located within the Town of Viroqua.
The Native American Ho-Chunk inhabited the area now known as Vernon County and the area of Viroqua. The Ho-Chunk, formerly known as the Winnebago, are a Siouan-speaking people and lived in the western Great Lakes region for thousands of years. The Ho-Chunk were removed westward beginning in the 1820s.
There was a sharp rivalry between Viroqua and Springville to be named the county seat of Vernon County. A deed for 40 acres (160,000 m2) of land was promised by pioneer Moses Decker, on condition that Viroqua be chosen as the county seat. The land constituted what became known as the County Addition to the city of Viroqua.