| Business | Phone |
| Rock County Circuit Court Clrk 51 S Main St, Janesville 53545 | (608) 743-2200 |
| Rock County Civil Court 51 S Main St, Janesville 53545 | (608) 743-2210 |
| Rock County Court System 51 S Main St, Janesville 53545 | (608) 743-2261 |
| Rock County Court-Adoptions 51 S Main St, Janesville 53545 | (608) 757-5638 |
| Rock County Family Court 51 S Main St, Janesville 53545 | (608) 757-5547 |
| Rock County Juvenile Court 51 S Main St, Janesville 53545 | (608) 743-2212 |
| Rock County Paternity Court 51 S Main St, Janesville 53545 | (608) 757-5633 |
| Rock County Small Claims Court 51 S Main St, Janesville 53545 | (608) 743-2214 |
| Rock County Traffic Court 51 S Main St, Janesville 53545 | (608) 743-2215 |