10 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 43015 | Delaware | 61,401 |
| 43065 | Powell | 46,679 |
| 43035 | Lewis Center | 36,012 |
| 43082 | Westerville | 34,563 |
| 43074 | Sunbury | 16,873 |
| 43021 | Galena | 14,403 |
| 43240 | Columbus | 7,679 |
| 43061 | Ostrander | 4,921 |
| 43066 | Radnor | 1,368 |
| 43032 | Kilbourne | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 10 ZCTAs in Delaware County, Ohio (US Census).