| Zip Code | City | Population ↓ |
|---|---|---|
| 21629 | Denton | 9,988 |
| 21632 | Federalsburg | 6,504 |
| 21655 | Preston | 4,753 |
| 21639 | Greensboro | 4,734 |
| 21660 | Ridgely | 4,100 |
| 21640 | Henderson | 1,374 |
| 21636 | Goldsboro | 824 |
| 21641 | Hillsboro | 149 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Caroline County, Maryland (US Census).