Rock County is named for the Rock River which flows through the county.
Created: December 7, 1836
Janesville 1836 – present
County Courthouse – Janesville
Location: 51 South Main Street / Court Street
Built: 1954 – 1955
Architect: Carl Lloyd Ames of Milwaukee
Contractor: J P Cullen of Janesville
Description: The building faces south and is a five story buff colored brick, glass and concrete structure. The building rises north up a slope. The south center section is rounded with supporting pillars on the first story at the entrance. The building has square lines with large corner windows. On the west side is a square tower. An addition was built in 1997 on the site of the old Court House. The architect was Kenton Peters of Madison and the contractor was Miron Construction of Neenah.
E – Walworth County
W – Green County
Photos taken 2005 and 2008