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 — CITY/MD/NORTH-POTOMAC

North Potomac ZIP codes, Maryland

No ZIP code is named for North Potomac, MD; addresses there use a neighbouring town's name. 2 ZIP codes cover it: 20878 and 20850. Its area codes are 240, 301 and 227.

USPS city name
0 ZIP codes
Overlapping the city
2 more
Population
23,922
Area codes
240, 301, 227

NANPA lists no telephone rate centre for North Potomac itself, so these are the area codes of the nearest one, Gaithersburg (0.0 miles). A town on an area-code boundary can differ from its neighbour.

North Potomac in numbers

About 23,922 people live in North Potomac, in 8,144 households. The median household income is $186,514 a year, 80% above the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $826,200 (97% above the Maryland median), and median gross rent is $2,413 a month. The median age is 46.5; 77.2% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 32 minutes.

Population23,922North Potomac23,922
Households8,144North Potomac8,144
Median age46.5North Potomac46.5Maryland39.4US 38.9
Median household income$186,514North Potomac$186,514Maryland$103,678US $80,734
Median home value$826,200North Potomac$826,200Maryland$419,900US $332,700
Median gross rent$2,413North Potomac$2,413Maryland$1,705US $1,413
Bachelor's degree or higher77.2%North Potomac77.2%Maryland43.4%US 35.7%
Mean commute31.5 minNorth Potomac31.5 minMaryland31.1 minUS 26.4 min
Population density3,668 / sq miNorth Potomac3,668 / sq mi

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

ZIP codes covering North Potomac

These ZIP codes cover part of North Potomac but are addressed as somewhere else.

ZIP codes overlapping North Potomac
ZIP City Type Population Median income Median home
20850 Rockville , MD Standard 50,353 $125,950 $714,400
20878 Gaithersburg , MD Standard 66,115 $144,313 $715,800

Map of North Potomac ZIP codes

2085020878

The ZIP codes of North Potomac, MD, 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.

Towns near North Potomac

The nearest larger towns are Gaithersburg (69,825 people, 4.3 mi), Rockville (67,671 people, 4.5 mi) and Germantown (90,719 people, 5.5 mi).

Towns near North Potomac
TownPopulationDistance
Travilah 11,721 2.7 mi
Darnestown 7,051 4.0 mi
Gaithersburg 69,825 4.3 mi
Rockville 67,671 4.5 mi
Germantown 90,719 5.5 mi
Redland 18,665 5.6 mi
Flower Hill 13,794 5.7 mi
Potomac 45,902 6.2 mi
Montgomery Village 34,110 6.6 mi
Great Falls, VA 15,228 6.8 mi
Lowes Island, VA 11,018 7.1 mi
North Bethesda 49,677 7.6 mi
Sugarland Run, VA 12,629 8.2 mi
Aspen Hill 53,279 8.4 mi

More nearby: every ZIP code in Montgomery County · Maryland ZIP codes

Cite this page

zipcodes.pro. “North Potomac, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/north-potomac

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