| Place Name | Janesville (town) |
| Place Type | Town |
| ZIP Code(s) | 53545 53548 53563 |
| County | Rock County |
| Area Code(s) | 608 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 3,670 |
| Majority Ethnicity | White 98.47% |
| Metro/Micro Stats Area | Janesville-Beloit, WI |
| US Congressional District(s) | Wisconsin 2ndWisconsin 1st |
| State Assembly Districts | 43 |
| State Senate Districts | 15 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.47% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0.33% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.2% |