Frederick County Maryland has a total of 37 ZIP Codes. The ZIP Codes in Frederick County range from 20842 to 21798. There are 10 ZIP Codes in Frederick County that extend into adjacent counties (Carroll County, Howard County, Montgomery County, and Washington County).
| ZIP Code | ZIP Code City/Town | |||
|---|---|---|---|---|
| Dickerson | |||
| Clarksburg | |||
| Frederick | |||
| Frederick | |||
| Frederick | |||
| Frederick | |||
| Frederick | |||
| Frederick | |||
| Adamstown | |||
| Braddock Heights | |||
| Brunswick | |||
| Buckeystown | |||
| Burkittsville | |||
| Emmitsburg | |||
| Ijamsville | |||
| Jefferson | |||
| Keymar | |||
| Knoxville | |||
| Ladiesburg | |||
| Libertytown | |||
| Middletown | |||
| Monrovia | |||
| Mount Airy | |||
| Myersville | |||
| New Market | |||
| New Midway | |||
| New Windsor | |||
| Point of Rocks | |||
| Rocky Ridge | |||
| Sabillasville | |||
| Smithsburg | |||
| Taneytown | |||
| Thurmont | |||
| Tuscarora | |||
| Union Bridge | |||
| Walkersville | |||
| Woodsboro |