| Locality | Post Code |
|---|---|
| Darien, Walworth | 53114 |
| Delavan, Walworth | 53115 |
| East Troy, Walworth | 53120 |
| Elkhorn, Walworth | 53121 |
| Fontana, Walworth | 53125 |
| Genoa City, Walworth | 53128 |
| Honey Creek, Walworth | 53138 |
| Lake Geneva, Walworth | 53147 |
| Lyons, Walworth | 53148 |
| Pell Lake, Walworth | 53157 |
| Sharon, Walworth | 53585 |
| Springfield, Walworth | 53176 |
| Walworth, Walworth | 53184 |
| Whitewater, Walworth | 53190 |
| Williams Bay, Walworth | 53191 |
| Zenda, Walworth | 53195 |