10 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 43506 | Bryan | 14,691 |
| 43543 | Montpelier | 7,476 |
| 43517 | Edgerton | 3,438 |
| 43557 | Stryker | 3,219 |
| 43518 | Edon | 3,003 |
| 43570 | West Unity | 2,819 |
| 43554 | Pioneer | 2,035 |
| 43501 | Alvordton | 761 |
| 43531 | Kunkle | 219 |
| 43505 | Blakeslee | 143 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Williams County, Ohio (US Census).