Rock County, Wisconsin
13 ZIP codes · 718.17 sq mi of land · FIPS 55105
| Population | 164,350 |
|---|---|
| State | Wisconsin |
| FIPS code | 55105 |
| Time zone | Central |
| Land area | 718.17 sq mi |
| Center (lat, long) | 42.6699, -89.0753 |
Area codes in this area
These are the area codes that most often serve Rock County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Cities and towns (largest first)
Janesville · 66,030Beloit · 36,534AftonAvalonBrodheadClintonEdgertonEvansvilleFootvilleMiltonOrfordville
ZIP codes in Rock County
53501 Afton53505 Avalon53511 Beloit53520 Brodhead53525 Clinton53534 Edgerton53536 Evansville53537 Footville53545 Janesville53546 Janesville53548 Janesville53563 Milton53576 Orfordville
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.