Gaithersburg ZIP Codes

List of Zip Codes of Gaithersburg

The following table lists ZIP Codes associated with Gaithersburg, Maryland, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.


S.N. Zip Code Latitude Longitude County Population Density
1 20877 39.14068 -77.18865 Montgomery 39,068 2674.2
2 20878 39.11376 -77.24781 Montgomery 65,236 1231.7
3 20879 39.16992 -77.17416 Montgomery 26,120 1170.5
4 20882 39.23182 -77.14514 Montgomery 13,661 139.7
5 20899 39.14442 -77.21621 Montgomery 106 386.1


About Gaithersburg Maryland Zip Codes

The city of Gaithersburg in Maryland (MD) is served by approximately 5 ZIP Codes. These codes cover residential neighborhoods, business districts, and surrounding localities that use the city name in their mailing address.

Based on ZIP-level population estimates, the combined population covered by these ZIP Codes is around 144,191 people. Population density can vary significantly from one ZIP Code to another, reflecting the mix of dense urban blocks, commercial corridors, and lower-density residential areas.

The ZIP Codes associated with Gaithersburg fall within county jurisdictions such as Montgomery. Each county manages local services, land use, and administration for the areas corresponding to its ZIP Codes.

Most ZIP codes for Gaithersburg, Maryland follow the America/New_York time zone.