14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 48197 | Ypsilanti | 65,911 |
| 48103 | Ann Arbor | 54,635 |
| 48104 | Ann Arbor | 43,762 |
| 48198 | Ypsilanti | 39,507 |
| 48105 | Ann Arbor | 36,959 |
| 48108 | Ann Arbor | 27,472 |
| 48176 | Saline | 23,325 |
| 48130 | Dexter | 16,849 |
| 48189 | Whitmore Lake | 13,748 |
| 48118 | Chelsea | 13,088 |
| 48158 | Manchester | 7,688 |
| 48109 | Ann Arbor | 5,722 |
| 48191 | Willis | 4,253 |
| 48190 | Whittaker | 108 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Washtenaw County, Michigan (US Census).