Janesville is the largest city and the county seat of Rock County, Wisconsin, United States. It is a principal municipality of the Janesville, Wisconsin, Metropolitan Statistical Area and is included in the Madison–Janesville–Beloit, WI Combined Statistical Area. As of the 2020 census, the city had a population of 65,615.
Zip Codes in Janesville, WI that we also serve: 53545 53546 53548 53547