Gaithersburg, MD Insights: Population,
Zip Codes, Influence, and Service Areas

Gaithersburg (/ˈɡeɪθərzbɜːrɡ/ i GAY-thərz-burg), officially the City of Gaithersburg, is a city in Montgomery County, Maryland, United States. At the time of the 2020 U.S. Census, Gaithersburg had a population of 69,657, making it the ninth-largest community in the state. Gaithersburg is located to the northwest of Washington, and is considered a suburb and a primary city within the Washington–Arlington–Alexandria, DC–VA–MD–WV Metropolitan Statistical Area. Gaithersburg was incorporated as a town in 1878 and as a city in 1968.

Zip Codes in Gaithersburg, MD that we also serve: 20899 20878 20879 20877 20884 20885 20898





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