26 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 53051 | Menomonee Falls | 39,000 |
| 53066 | Oconomowoc | 37,056 |
| 53188 | Waukesha | 34,290 |
| 53186 | Waukesha | 33,264 |
| 53151 | New Berlin | 32,865 |
| 53072 | Pewaukee | 26,652 |
| 53189 | Waukesha | 26,607 |
| 53150 | Muskego | 26,142 |
| 53045 | Brookfield | 23,072 |
| 53005 | Brookfield | 22,125 |
| 53029 | Hartland | 21,420 |
| 53089 | Sussex | 20,202 |
| 53149 | Mukwonago | 19,601 |
| 53018 | Delafield | 7,884 |
| 53146 | New Berlin | 7,348 |
| 53118 | Dousman | 7,107 |
| 53122 | Elm Grove | 6,467 |
| 53119 | Eagle | 5,732 |
| 53103 | Big Bend | 3,573 |
| 53058 | Nashotah | 3,310 |
| 53183 | Wales | 3,073 |
| 53153 | North Prairie | 2,728 |
| 53007 | Butler | 2,003 |
| 53046 | Lannon | 1,475 |
| 53069 | Okauchee | 819 |
| 53127 | Genesee Depot | 211 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 26 ZCTAs in Waukesha County, Wisconsin (US Census).