Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/MD/COUNTY/MONTGOMERY

Montgomery County, MD ZIP codes

There are 76 ZIP codes in Montgomery County, MD, in 30 towns, from 20810 to 20997. The largest are 20906 (Silver Spring), 20878 (Gaithersburg) and 20874 (Germantown).

The county seat is Rockville.

ZIP codes
76
Towns
30
County seat
Rockville
County FIPS
24031
Population
1,065,949
Median household income
$132,450
Land area
493 sq mi
Area codes
227, 240, 301

Montgomery County ZIP codes by town

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Montgomery County ZIP codes

20810208112081220813208142081520816208172081820824208252082720830208322083320837208382083920841208422084720848208492085020851208522085320854208552085720859208602086120862208662086820871208722087420875208762087720878208792088020882208832088420885208862088920891208922089420895208962089720898208992090120902209032090420905209062090720908209102091120912209142091520916209182099320997

The ZIP codes of Montgomery County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Montgomery County in numbers

About 1,065,949 people live in Montgomery County, in 389,210 households, the most populous of Maryland's 24 counties. The median household income is $132,450 a year, 28% above the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $640,300 (52% above the Maryland median), and median gross rent is $2,068 a month. The median age is 40.2; 60.6% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 32 minutes.

Population1,065,949Montgomery1,065,949
Households389,210Montgomery389,210
Median age40.2Montgomery40.2Maryland39.4US 38.9
Median household income$132,450Montgomery$132,450Maryland$103,678US $80,734
Median home value$640,300Montgomery$640,300Maryland$419,900US $332,700
Median gross rent$2,068Montgomery$2,068Maryland$1,705US $1,413
Bachelor's degree or higher60.6%Montgomery60.6%Maryland43.4%US 35.7%
Mean commute31.9 minMontgomery31.9 minMaryland31.1 minUS 26.4 min
Population density2,162 / sq miMontgomery2,162 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Montgomery County

Largest towns in Montgomery County
TownZIP codesPopulation
Germantown 3 90,719
Silver Spring 16 81,462
Gaithersburg 9 69,825
Bethesda 11 69,397
Rockville 8 67,671
Potomac 2 45,902
Olney 2 35,797
Montgomery Village 1 34,110
Clarksburg 1 30,487
Damascus 1 17,640
Takoma Park 1 17,632
Burtonsville 1 10,203
Boyds 1 9,969
Poolesville 1 5,764
Chevy Chase 2 2,906

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Montgomery County.

Not sure you are in Montgomery County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Montgomery County, with figures

ZIP codes in Montgomery County
ZIP City Type Population Median income Median home
20810 Bethesda , MD No street area — — —
20811 Bethesda , MD No street area — — —
20812 Glen Echo , MD Standard 276 $213,750 $1,163,500
20813 Bethesda , MD No street area — — —
20814 Bethesda , MD Standard 32,795 $150,996 $989,600
20815 Chevy Chase , MD Standard 30,505 $194,971 $1,294,200
20816 Bethesda , MD Standard 18,140 $232,656 $1,217,200
20817 Bethesda , MD Standard 37,454 $249,332 $1,183,600
20818 Cabin John , MD Standard 1,539 $245,982 $1,335,100
20824 Bethesda , MD No street area — — —
20825 Chevy Chase , MD No street area — — —
20827 Bethesda , MD No street area — — —
20830 Olney , MD No street area — — —
20832 Olney , MD Standard 25,553 $168,524 $627,000
20833 Brookeville , MD Standard 7,860 $204,375 $797,100
20837 Poolesville , MD Standard 6,699 $174,063 $772,300
20838 Barnesville , MD Standard 306 $250,000+ $775,700
20839 Beallsville , MD Standard 158 $160,329 $950,000
20841 Boyds , MD Standard 9,969 $184,688 $782,500
20842 Dickerson , MD Standard 2,369 $204,013 $745,800
20847 Rockville , MD No street area — — —
20848 Rockville , MD No street area — — —
20849 Rockville , MD No street area — — —
20850 Rockville , MD Standard 50,353 $125,950 $714,400
20851 Rockville , MD Standard 14,946 $126,411 $568,900
20852 Rockville , MD Standard 48,180 $122,472 $665,200
20853 Rockville , MD Standard 31,851 $159,080 $631,900
20854 Potomac , MD Standard 50,498 $250,000+ $1,165,400
20855 Derwood , MD Standard 17,279 $149,110 $640,300
20857 Rockville , MD No street area — — —
20859 Potomac , MD No street area — — —
20860 Sandy Spring , MD Standard 2,035 — $654,200
20861 Ashton , MD Standard 2,890 $163,438 $852,700
20862 Brinklow , MD Standard 430 $189,667 $810,600
20866 Burtonsville , MD Standard 15,986 $140,308 $446,900
20868 Spencerville , MD Standard 198 $143,333 $622,200
20871 Clarksburg , MD Standard 30,182 $177,523 $668,800
20872 Damascus , MD Standard 13,983 $141,050 $504,300
20874 Germantown , MD Standard 62,738 $115,022 $399,000
20875 Germantown , MD No street area — — —
20876 Germantown , MD Standard 26,406 $119,731 $487,300
20877 Gaithersburg , MD Standard 38,546 $92,800 $474,800
20878 Gaithersburg , MD Standard 66,115 $144,313 $715,800
20879 Gaithersburg , MD Standard 25,264 $112,104 $468,100
20880 Washington Grove , MD Standard 577 $134,583 $612,700
20882 Gaithersburg , MD Standard 13,751 $184,136 $737,400
20883 Gaithersburg , MD No street area — — —
20884 Gaithersburg , MD No street area — — —
20885 Gaithersburg , MD No street area — — —
20886 Montgomery Village , MD Standard 34,718 $98,542 $386,500
20889 Bethesda , MD Standard 584 — —
20891 Kensington , MD No street area — — —
20892 Bethesda , MD Standard 0 — —
20894 Bethesda , MD Standard 0 — —
20895 Kensington , MD Standard 19,184 $173,625 $781,500
20896 Garrett Park , MD Standard 932 $250,000+ $1,005,700
20897 Suburb Maryland Fac , MD No street area — — —
20898 Gaithersburg , MD No street area — — —
20899 Gaithersburg , MD Standard 57 $24,417 —
20901 Silver Spring , MD Standard 36,435 $131,386 $589,800
20902 Silver Spring , MD Standard 54,261 $114,486 $551,200
20903 Silver Spring , MD Standard 24,815 $80,768 $485,700
20904 Silver Spring , MD Standard 58,646 $96,025 $560,000
20905 Silver Spring , MD Standard 19,004 $159,740 $656,700
20906 Silver Spring , MD Standard 70,595 $97,521 $455,800
20907 Silver Spring , MD No street area — — —
20908 Silver Spring , MD No street area — — —
20910 Silver Spring , MD Standard 45,943 $112,134 $730,900
20911 Silver Spring , MD No street area — — —
20912 Takoma Park , MD Standard 25,749 $83,870 $699,300
20914 Silver Spring , MD No street area — — —
20915 Silver Spring , MD No street area — — —
20916 Silver Spring , MD No street area — — —
20918 Silver Spring , MD No street area — — —
20993 Silver Spring , MD No street area — — —
20997 Silver Spring , MD No street area — — —

Cite this page

zipcodes.pro. “Montgomery County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/md/county/montgomery

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