Washington County, Maryland ZIP Codes
- ZIP records
19 - Cities represented
17 - Sum of listed ZIP population estimates
159,858
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 21740 | Hagerstown | 64,792 |
| 2 | 21742 | Hagerstown | 34,069 |
| 3 | 21795 | Williamsport | 10,144 |
| 4 | 21783 | Smithsburg | 9,910 |
| 5 | 21713 | Boonsboro | 9,846 |
| 6 | 21722 | Clear Spring | 6,721 |
| 7 | 21758 | Knoxville | 4,409 |
| 8 | 21782 | Sharpsburg | 3,704 |
| 9 | 21756 | Keedysville | 3,640 |
| 10 | 21750 | Hancock | 3,417 |
Cities in Washington County
- Big Pool
- Boonsboro
- Brownsville
- Cascade
- Clear Spring
- Fairplay
- Funkstown
- Hagerstown
- Hancock
- Keedysville
- Knoxville
- Maugansville
- Rohrersville
- Saint James
- Sharpsburg
- Smithsburg
- Williamsport
ZIP Directory
- ZIP 21711
- ZIP 21713
- ZIP 21715
- ZIP 21719
- ZIP 21722
- ZIP 21733
- ZIP 21734
- ZIP 21740
- ZIP 21742
- ZIP 21746
- ZIP 21750
- ZIP 21756
- ZIP 21758
- ZIP 21767
- ZIP 21779
- ZIP 21781
- ZIP 21782
- ZIP 21783
- ZIP 21795
Browse all ZIP data for Maryland
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.