26 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 53051 | Menomonee Falls | 39,559 |
| 53066 | Oconomowoc | 37,558 |
| 53188 | Waukesha | 34,892 |
| 53186 | Waukesha | 33,374 |
| 53151 | New Berlin | 32,824 |
| 53189 | Waukesha | 26,855 |
| 53150 | Muskego | 26,259 |
| 53072 | Pewaukee | 26,200 |
| 53045 | Brookfield | 23,329 |
| 53029 | Hartland | 21,778 |
| 53005 | Brookfield | 21,675 |
| 53089 | Sussex | 20,588 |
| 53149 | Mukwonago | 19,614 |
| 53018 | Delafield | 8,201 |
| 53118 | Dousman | 7,554 |
| 53146 | New Berlin | 7,285 |
| 53122 | Elm Grove | 6,508 |
| 53119 | Eagle | 5,803 |
| 53103 | Big Bend | 3,762 |
| 53058 | Nashotah | 3,405 |
| 53183 | Wales | 3,111 |
| 53153 | North Prairie | 2,548 |
| 53007 | Butler | 1,859 |
| 53046 | Lannon | 1,482 |
| 53069 | Okauchee | 671 |
| 53127 | Genesee Depot | 79 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 26 ZCTAs in Waukesha County, Wisconsin (US Census).