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/GARRETTS-MILL

Garretts Mill ZIP codes, Maryland

No ZIP code is named for Garretts Mill, MD; addresses there use a neighbouring town's name. The ZIP code covering it is 21758. Its area codes are 240, 301 and 227.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
244
Area codes
240, 301, 227

NANPA lists no telephone rate centre for Garretts Mill itself, so these are the area codes of the nearest one, Brunswick (2.9 miles). A town on an area-code boundary can differ from its neighbour.

Garretts Mill in numbers

About 244 people live in Garretts Mill, in 120 households. The median owner-occupied home is valued at $204,400 (51% below the Maryland median), and median gross rent is $1,798 a month. The median age is 36.9; 48.4% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 26 minutes.

Population244Garretts Mill244
Households120Garretts Mill120
Median age36.9Garretts Mill36.9Maryland39.4US 38.9
Median home value$204,400Garretts Mill$204,400Maryland$419,900US $332,700
Median gross rent$1,798Garretts Mill$1,798Maryland$1,705US $1,413
Bachelor's degree or higher48.4%Garretts Mill48.4%Maryland43.4%US 35.7%
Mean commute26.0 minGarretts Mill26.0 minMaryland31.1 minUS 26.4 min
Population density427 / sq miGarretts Mill427 / sq mi

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

ZIP codes covering Garretts Mill

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

ZIP codes overlapping Garretts Mill
ZIP City Type Population Median income Median home
21758 Knoxville , MD Standard 4,409 $111,528 $424,600

Map of Garretts Mill ZIP codes

21758

The ZIP codes of Garretts Mill, 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 Garretts Mill

The nearest larger towns are Harpers Ferry, WV (350 people, 3.4 mi), Rosemont (310 people, 3.8 mi) and Bolivar, WV (1,215 people, 3.9 mi).

Towns near Garretts Mill
TownPopulationDistance
Brunswick 8,450 4.2 mi
Lovettsville, VA 2,719 6.3 mi
Jefferson 3,314 8.0 mi
Middletown 5,014 10.2 mi
Ranson, WV 5,729 10.8 mi
Boonsboro 3,809 10.9 mi
Braddock Heights 2,892 11.1 mi
Shannondale, WV 3,465 11.7 mi
Charles Town, WV 7,337 12.0 mi
Ballenger Creek 26,390 14.5 mi
Purcellville, VA 8,973 15.0 mi
St. James 4,824 15.6 mi
Frederick 83,395 15.7 mi
Martinsburg, WV 18,904 17.0 mi

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

Cite this page

zipcodes.pro. “Garretts Mill, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/garretts-mill

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