Montgomery County, Maryland ZIP Codes
- ZIP records
48 - Cities represented
29 - Sum of listed ZIP population estimates
1,076,754
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 | 20906 | Silver Spring | 70,595 |
| 2 | 20878 | Gaithersburg | 66,115 |
| 3 | 20874 | Germantown | 62,738 |
| 4 | 20904 | Silver Spring | 58,646 |
| 5 | 20902 | Silver Spring | 54,261 |
| 6 | 20854 | Potomac | 50,498 |
| 7 | 20850 | Rockville | 50,353 |
| 8 | 20852 | Rockville | 48,180 |
| 9 | 20910 | Silver Spring | 45,943 |
| 10 | 20877 | Gaithersburg | 38,546 |
Cities in Montgomery County
- Ashton
- Barnesville
- Bealsville
- Bethesda
- Boyds
- Brinklow
- Brookeville
- Burtonsville
- Cabin John
- Chevy Chase
- Clarksburg
- Damascus
- Derwood
- Dickerson
- Gaithersburg
- Garrett Park
- Germantown
- Glen Echo
- Kensington
- Montgomery Village
- Olney
- Poolesville
- Potomac
- Rockville
- Sandy Spring
- Silver Spring
- Spencerville
- Takoma Park
- Washington Grove
ZIP Directory
- ZIP 20812
- ZIP 20814
- ZIP 20815
- ZIP 20816
- ZIP 20817
- ZIP 20818
- ZIP 20832
- ZIP 20833
- ZIP 20837
- ZIP 20838
- ZIP 20839
- ZIP 20841
- ZIP 20842
- ZIP 20850
- ZIP 20851
- ZIP 20852
- ZIP 20853
- ZIP 20854
- ZIP 20855
- ZIP 20860
- ZIP 20861
- ZIP 20862
- ZIP 20866
- ZIP 20868
- ZIP 20871
- ZIP 20872
- ZIP 20874
- ZIP 20876
- ZIP 20877
- ZIP 20878
- ZIP 20879
- ZIP 20880
- ZIP 20882
- ZIP 20886
- ZIP 20889
- ZIP 20892
- ZIP 20894
- ZIP 20895
- ZIP 20896
- ZIP 20899
- ZIP 20901
- ZIP 20902
- ZIP 20903
- ZIP 20904
- ZIP 20905
- ZIP 20906
- ZIP 20910
- ZIP 20912
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.