ZIP CodesZIP codes in Rock County, Wisconsin
Rock County, Wisconsin has 15 ZIP codes in this list, from 53501 to 53576. They cover 11 places, among them Janesville, Beloit, Afton and Avalon.
Nothing in this county matches.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 53501 | Afton | 0.5 | 42.605, -89.070 |
| 53505 | Avalon | 22.1 | 42.659, -88.831 |
| 53511 | Beloit | 115 | 42.562, -89.086 |
| 53512 | Beloit | no area | 42.508, -89.032 |
| 53525 | Clinton | 57.0 | 42.553, -88.871 |
| 53534 | Edgerton | 85.2 | 42.839, -89.064 |
| 53536 | Evansville | 88.9 | 42.773, -89.288 |
| 53537 | Footville | 0.9 | 42.673, -89.211 |
| 53542 | Hanover | no area | 42.632, -89.159 |
| 53545 | Janesville | 22.5 | 42.736, -89.040 |
| 53546 | Janesville | 81.1 | 42.668, -89.002 |
| 53547 | Janesville | no area | 42.729, -89.030 |
| 53548 | Janesville | 75.0 | 42.685, -89.129 |
| 53563 | Milton | 67.0 | 42.779, -88.953 |
| 53576 | Orfordville | 31.1 | 42.628, -89.253 |
The ZIP code areas of Rock County add up to about 646 square miles of land (1,674 sq km) as the Census Bureau draws them. The largest is 53511 (Beloit), with 115 square miles.
Places with more than one code here: Janesville (4 codes), Beloit (2 codes).
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Afton, WI 53501.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.