There are two options to make those second installment payments:
- Mail their payments to the following address. Note that the Treasurer's Office accepts July 31st postmark as a timely payment.
Rock County Treasurer
PO Box 1975
Janesville, WI 53547
- Pay in person at the Rock County Treasurer's Office located in the Rock County Courthouse at 51 S. Main Street, Janesville, WI. The Treasurer's office will NOT be open on Saturday, July 31st to collect tax payments.
If you have any questions feel free to contact City Hall at 868-6900 or the Rock County Treasurer's Office at 757-5670.