17 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 19904 | Dover | 38,818 |
| 19901 | Dover | 37,763 |
| 19977 | Smyrna | 27,704 |
| 19934 | Camden Wyoming | 14,061 |
| 19962 | Magnolia | 13,770 |
| 19943 | Felton | 13,410 |
| 19952 | Harrington | 10,908 |
| 19938 | Clayton | 9,561 |
| 19946 | Frederica | 5,603 |
| 19953 | Hartly | 5,255 |
| 19954 | Houston | 1,427 |
| 19964 | Marydel | 1,418 |
| 19979 | Viola | 619 |
| 19955 | Kenton | 352 |
| 19980 | Woodside | 268 |
| 19936 | Cheswold | 152 |
| 19902 | Dover Afb | 44 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 17 ZCTAs in Kent County, Delaware (US Census).