There are 28 zip codes in Frederick County, Maryland. The most populated is 21702, located in Frederick. * 2024 populations estimated based on the latest ACS 5-year data.
Zip Code | Population | City |
|---|---|---|
| 21702 | 46,596 | Frederick |
| 21701 | 40,787 | Frederick |
| 21703 | 39,606 | Frederick |
| 21771 | 31,653 | Mount Airy |
| 21704 | 18,473 | Frederick |
| 21774 | 15,096 | New Market |
| 21769 | 12,562 | Middletown |
| 21788 | 11,412 | Thurmont |
| 21793 | 10,882 | Walkersville |
| 21770 | 7,786 | Monrovia |
| 21754 | 7,260 | Ijamsville |
| 21716 | 6,630 | Brunswick |
| 21727 | 6,588 | Emmitsburg |
| 21755 | 5,706 | Jefferson |
| 21773 | 5,553 | Myersville |
| 21710 | 4,988 | Adamstown |
| 21791 | 4,855 | Union Bridge |
| 21758 | 4,610 | Knoxville |
| 21798 | 2,699 | Woodsboro |
| 21777 | 2,360 | Point Of Rocks |
| 21780 | 1,975 | Sabillasville |
| 21778 | 880 | Rocky Ridge |
| 21714 | 272 | Braddock Heights |
| 21717 | 209 | Buckeystown |
| 21762 | 176 | Libertytown |
| 21718 | 143 | Burkittsville |
| 21705 | 5 | Frederick |
| 21790 | 0 | Tuscarora |