| Zip Code | City | Population ↓ |
|---|---|---|
| 43015 | Delaware | 57,745 |
| 43065 | Powell | 45,067 |
| 43035 | Lewis Center | 34,661 |
| 43082 | Westerville | 33,195 |
| 43074 | Sunbury | 15,597 |
| 43021 | Galena | 14,295 |
| 43240 | Columbus | 6,968 |
| 43061 | Ostrander | 5,045 |
| 43066 | Radnor | 1,173 |
| 43032 | Kilbourne | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Delaware County, Ohio (US Census).