| Zip Code | City | Population ↓ |
|---|---|---|
| 43506 | Bryan | 14,584 |
| 43543 | Montpelier | 7,579 |
| 43517 | Edgerton | 3,561 |
| 43557 | Stryker | 3,246 |
| 43570 | West Unity | 3,069 |
| 43518 | Edon | 2,999 |
| 43554 | Pioneer | 2,129 |
| 43501 | Alvordton | 941 |
| 43531 | Kunkle | 192 |
| 43505 | Blakeslee | 96 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Williams County, Ohio (US Census).