8 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 21629 | Denton | 10,252 |
| 21632 | Federalsburg | 6,436 |
| 21655 | Preston | 5,053 |
| 21639 | Greensboro | 4,682 |
| 21660 | Ridgely | 4,132 |
| 21640 | Henderson | 1,163 |
| 21636 | Goldsboro | 1,097 |
| 21641 | Hillsboro | 127 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 8 ZCTAs in Caroline County, Maryland (US Census).