Zip Code | City | Population |
|---|---|---|
| 21921 | Elkton | 45,081 |
| 21901 | North East | 19,938 |
| 21911 | Rising Sun | 10,804 |
| 21904 | Port Deposit | 5,975 |
| 21903 | Perryville | 5,332 |
| 21918 | Conowingo | 4,462 |
| 21919 | Earleville | 3,451 |
| 21915 | Chesapeake City | 2,469 |
| 21917 | Colora | 1,884 |
| 21912 | Warwick | 1,495 |
| 21920 | Elk Mills | 1,089 |
| 21913 | Cecilton | 878 |
| 21914 | Charlestown | 740 |
| 21902 | Perry Point | 251 |
| 21930 | Georgetown | 27 |