| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 53114 | Darien | Walworth County | Standard |
| 53190 | Whitewater | Walworth County | Standard |
| 53501 | Afton | Rock County | PO Box |
| 53502 | Albany | Green County | Standard |
| 53505 | Avalon | Rock County | Standard |
| 53511 | Beloit | Rock County | Standard |
| 53512 | Beloit | Rock County | PO Box |
| 53520 | Brodhead | Rock County | Standard |
| 53521 | Brooklyn | Green County | Standard |
| 53525 | Clinton | Rock County | Standard |
| 53534 | Edgerton | Rock County | Standard |
| 53536 | Evansville | Rock County | Standard |
| 53537 | Footville | Rock County | PO Box |
| 53538 | Fort Atkinson | Jefferson County | Standard |
| 53542 | Hanover | Rock County | PO Box |
| 53545 | Janesville | Rock County | Standard |
| 53546 | Janesville | Rock County | Standard |
| 53547 | Janesville | Rock County | PO Box |
| 53548 | Janesville | Rock County | Standard |
| 53563 | Milton | Rock County | Standard |
| 53576 | Orfordville | Rock County | Standard |
| 53585 | Sharon | Walworth County | Standard |