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/MERCERSVILLE

Mercersville ZIP codes, Maryland

No ZIP code is named for Mercersville, MD; addresses there use a neighbouring town's name. The ZIP code covering it is 21782. Its area codes are 240, 301 and 227.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
220
Area codes
240, 301, 227

NANPA lists no telephone rate centre for Mercersville itself, so these are the area codes of the nearest one, Keedysville (3.6 miles). A town on an area-code boundary can differ from its neighbour.

Mercersville in numbers

About 220 people live in Mercersville, in 96 households. The median household income is $53,611 a year, 48% below the Maryland median of $103,678 (US: $80,734). The median age is 58.7; 20.8% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland).

Population220Mercersville220
Households96Mercersville96
Median age58.7Mercersville58.7Maryland39.4US 38.9
Median household income$53,611Mercersville$53,611Maryland$103,678US $80,734
Bachelor's degree or higher20.8%Mercersville20.8%Maryland43.4%US 35.7%
Population density681 / sq miMercersville681 / sq mi

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

ZIP codes covering Mercersville

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

ZIP codes overlapping Mercersville
ZIP City Type Population Median income Median home
21782 Sharpsburg , MD Standard 3,704 $94,130 $311,600

Map of Mercersville ZIP codes

21782

The ZIP codes of Mercersville, 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 Mercersville

The nearest larger towns are Tilghmanton (282 people, 2.3 mi), Fairplay (511 people, 2.7 mi) and Sharpsburg (585 people, 3.0 mi).

Towns near Mercersville
TownPopulationDistance
St. James 4,824 5.2 mi
Boonsboro 3,809 5.4 mi
Halfway 10,849 8.1 mi
Hagerstown 43,665 10.0 mi
Robinwood 8,042 10.4 mi
Martinsburg, WV 18,904 11.7 mi
Middletown 5,014 12.9 mi
Paramount-Long Meadow 2,569 13.1 mi
Fountainhead-Orchard Hills 6,567 13.3 mi
Maugansville 3,624 13.5 mi
Ranson, WV 5,729 14.5 mi
Brunswick 8,450 14.6 mi
Smithsburg 3,115 14.6 mi
Jefferson 3,314 15.2 mi

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

Cite this page

zipcodes.pro. “Mercersville, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/mercersville

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