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/GREAT-MILLS

Great Mills ZIP code, Maryland

The ZIP code for Great Mills, MD is 20634.

USPS city name
1 ZIP code
Population
7,088

Great Mills in numbers

About 7,088 people live in Great Mills, in 2,694 households. The median household income is $139,375 a year, 34% above the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $342,300 (18% below the Maryland median).

Population7,088Great Mills7,088
Households2,694Great Mills2,694
Median household income$139,375Great Mills$139,375Maryland$103,678US $80,734
Median home value$342,300Great Mills$342,300Maryland$419,900US $332,700

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the ZIP code addressed as Great Mills. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Great Mills

ZIP codes with the USPS city name Great Mills
ZIP City Type Population Median income Median home
20634 Great Mills , MD Standard 7,088 $139,375 $342,300

Map of Great Mills ZIP codes

20634

The ZIP codes of Great Mills, 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 Great Mills

The nearest larger towns are Lexington Park (13,252 people, 3.0 mi), California (13,136 people, 3.9 mi) and Wildewood (7,552 people, 5.0 mi).

Towns near Great Mills
TownPopulationDistance
Lexington Park 13,252 3.0 mi
California 13,136 3.9 mi
Wildewood 7,552 5.0 mi
Drum Point 3,589 7.0 mi
Leonardtown 4,808 8.8 mi
Lusby 2,595 9.0 mi
Chesapeake Ranch Estates 9,241 9.1 mi
Golden Beach 3,830 20.3 mi
Prince Frederick 2,955 21.4 mi
Huntingtown 2,689 26.5 mi
Colonial Beach, VA 3,966 26.9 mi

More nearby: every ZIP code in St. Mary's County · Maryland ZIP codes

Cite this page

zipcodes.pro. “Great Mills, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/great-mills

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