The Rock County Courthouse is located at 51 South Main Street, Janesville, WI 53545; phone: 608-757-5660.
Photo: Brasstown Cottage, circa 1880, located at 1701 Colley Road, Beloit, WI. The Historic District was listed on the National Register of Historic Places in 1996. Photographed by user:Royalbroil, 2014, (own work) [cc-3.0], via Wikimedia Commons, accessed September, 2021.
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Most of the early settlers of Rock County came from New England and New York. The county was organized in 1845.
HISTORIC SITES