14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 48197 | Ypsilanti | 66,422 |
| 48103 | Ann Arbor | 54,563 |
| 48104 | Ann Arbor | 45,161 |
| 48198 | Ypsilanti | 39,867 |
| 48105 | Ann Arbor | 37,598 |
| 48108 | Ann Arbor | 26,888 |
| 48176 | Saline | 23,240 |
| 48130 | Dexter | 16,731 |
| 48189 | Whitmore Lake | 13,718 |
| 48118 | Chelsea | 13,001 |
| 48158 | Manchester | 7,883 |
| 48109 | Ann Arbor | 5,773 |
| 48191 | Willis | 4,059 |
| 48190 | Whittaker | 187 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Washtenaw County, Michigan (US Census).