There are 48 zip codes in Montgomery County, Maryland. The most populated is 20906, located in Silver Spring. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
20906Silver Spring71,560
20878Gaithersburg65,954
20874Germantown61,922
20904Silver Spring56,532
20902Silver Spring53,308
20850Rockville51,072
20854Potomac49,320
20852Rockville48,379
20910Silver Spring45,072
20877Gaithersburg38,524
20817Bethesda37,795
20901Silver Spring37,207
20886Montgomery Village34,692
20853Rockville31,794
20815Chevy Chase31,080
20814Bethesda30,234
20879Gaithersburg27,489
20871Clarksburg27,420
20876Germantown26,572
20912Takoma Park25,823
20832Olney25,488
20903Silver Spring25,324
20895Kensington19,273
20905Silver Spring17,451
20816Bethesda17,390
20866Burtonsville16,680
20855Derwood16,558
20851Rockville14,659
20882Gaithersburg13,962
20872Damascus12,932
20841Boyds9,312
20833Brookeville7,949
20837Poolesville6,651
20861Ashton3,031
20860Sandy Spring2,279
20842Dickerson1,927
20818Cabin John1,787
20896Garrett Park840
20868Spencerville630
20880Washington Grove604
20838Barnesville368
20812Glen Echo282
20862Brinklow268
20839Beallsville161
20889Bethesda158
20899Gaithersburg143
20892Bethesda0
20894Bethesda0
showing: 48 rows

Montgomery County, Maryland Zip Codes by Population (2024)