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County ProfileMD

Montgomery County

Population: 1,062,061 · 76 ZIP codes

Demographics

Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.

People
Total population
1,062,061
People
Median age
40.2
Housing
Total households
389,210
Income
Median household income
$132,450
Housing
Total housing units
406,531
Employment
Employment rate
65.9%
Education
Bachelor’s degree or higher
60.6%
Healthcare
Insured population
93%
County details
Local time 03:25:31(ET)
NameMontgomery
Total ZIP codes76total
ZIP codes (by type)
42 Standard25 PO Box9 Unique
Area code227, 240, 301
TimezoneEastern Time (ET)
Coordinates39.1373815, -77.2030633
Land area493.1 sq miles(1,277.2 km²)

Map of Montgomery county, Maryland with ZIP codes

Map of Montgomery County, Maryland and ZIP codes

Cities and Communities in Montgomery County

Compare the largest cities in Montgomery County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.

CityPopulation
Median incomeHousehold
ZIP codes
Germantown91,249$117,5463ZIPs
Silver Spring81,015$99,86016ZIPs
Gaithersburg69,657$112,4679ZIPs
Bethesda68,056$192,23711ZIPs
Rockville67,117$128,6498ZIPs
Potomac47,018$236,6752ZIPs
Olney35,820$171,4582ZIPs
Montgomery Village34,893$95,3481ZIPs
Clarksburg29,051$176,6781ZIPs
Takoma Park17,629$108,1362ZIPs
Damascus17,224$158,8831ZIPs
Boyds9,538—1ZIPs
Burtonsville9,498$134,2761ZIPs
Poolesville5,742$205,9191ZIPs
Ashton3,067—1ZIPs
Chevy Chase2,904$250,0012ZIPs
Derwood2,535$118,1941ZIPs
Cabin John2,459$250,0011ZIPs
Kensington2,122$152,2842ZIPs
Sandy Spring2,079—1ZIPs
Dickerson2,021—1ZIPs
Spencerville1,812$189,7661ZIPs
Garrett Park996$250,0011ZIPs
Washington Grove505$134,5831ZIPs
Brinklow453—1ZIPs
Glen Echo279$213,7501ZIPs
Beallsville176—1ZIPs
Brookeville166$165,6251ZIPs
Barnesville144$231,2501ZIPs

— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.

ZIP Codes in Montgomery County

Review the most populated postal areas across Montgomery County. Use the ranking below to compare resident density and demographic scales between the county's major zones.

ZIPCity
Median incomeHousehold
Population (ZIP)
20906Silver Spring$97,52171,641
20878Gaithersburg$144,31365,990
20874Germantown$115,02262,908
20904Silver Spring$96,02559,051
20902Silver Spring$114,48652,533
20850Rockville$125,95051,045
20854Potomac$250,00150,698
20852Rockville$122,47248,347
20910Silver Spring$112,13445,610
20817Bethesda$249,33238,908
20877Gaithersburg$92,80037,577
20901Silver Spring$131,38636,537
20886Montgomery Village$98,54235,649
20814Bethesda$150,99631,919
20815Chevy Chase$194,97131,517
20853Rockville$159,08030,611
20871Clarksburg$177,52328,557
20879Gaithersburg$112,10426,176
20876Germantown$119,73126,034
20832Olney$168,52425,969

Data Sources & Citations

The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:

  • United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
  • United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS