ZIP Code 20899
About Gaithersburg
Gaithersburg is a city in Montgomery County, Maryland, United States. At the time of the 2020 United States census, Gaithersburg had a population of 69,657, making it the third-largest incorporated city and the ninth-most populous community in the state. Gaithersburg is located to the northwest of Washington, D.C., and is considered a suburb and a primary city within the Washington metropolitan area. Gaithersburg was incorporated as a town in 1878 and as a city in 1968.
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Area Profile
US Census (ACS 5-year · Gazetteer)
106
population
$23,917
median household income
1,000
people / sq mi
$835
median gross rent
70.4
median age
89
housing units
89
households
0.1
land area (sq mi)