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/FREDERICK

Frederick ZIP codes, Maryland

Frederick, MD has 6 ZIP codes (21702, 21703, 21701, 21704, 21705 and 21709) and area codes 240, 301 and 227. The largest is 21702.

USPS city name
6 ZIP codes
Population
83,395
Area codes
240, 301, 227

Frederick in numbers

About 83,395 people live in Frederick, in 33,584 households, the 4th-largest of Maryland's 527 census places. The median household income is $97,069 a year, 6% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $401,500 (4% below the Maryland median), and median gross rent is $1,764 a month. The median age is 37.1; 43.2% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 30 minutes.

Population83,395Frederick83,395
Households33,584Frederick33,584
Median age37.1Frederick37.1Maryland39.4US 38.9
Median household income$97,069Frederick$97,069Maryland$103,678US $80,734
Median home value$401,500Frederick$401,500Maryland$419,900US $332,700
Median gross rent$1,764Frederick$1,764Maryland$1,705US $1,413
Bachelor's degree or higher43.2%Frederick43.2%Maryland43.4%US 35.7%
Mean commute30.0 minFrederick30.0 minMaryland31.1 minUS 26.4 min
Population density3,480 / sq miFrederick3,480 / sq mi

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

ZIP codes addressed as Frederick

ZIP codes with the USPS city name Frederick
ZIP City Type Population Median income Median home
21702 Frederick , MD Standard 49,605 $106,983 $426,300
21703 Frederick , MD Standard 41,960 $106,334 $384,600
21701 Frederick , MD Standard 43,048 $106,577 $435,000
21704 Frederick , MD Standard 20,006 $161,063 $612,000
21705 Frederick , MD Standard 6 — —
21709 Frederick , MD No street area — — —

Map of Frederick ZIP codes

217022170321701217042170521709

The ZIP codes of Frederick, 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 Frederick

The nearest larger towns are Germantown (90,719 people, 20 mi), Columbia (104,338 people, 34 mi) and Arlington, VA (236,254 people, 42 mi).

Towns near Frederick
TownPopulationDistance
Ballenger Creek 26,390 3.7 mi
Walkersville 6,414 3.9 mi
Spring Ridge 5,922 4.5 mi
Bartonsville 3,282 4.5 mi
Braddock Heights 2,892 4.5 mi
Linganore 14,444 6.2 mi
Middletown 5,014 6.5 mi
Jefferson 3,314 8.2 mi
Urbana 14,260 8.4 mi
Monrovia 3,568 9.1 mi
Green Valley 13,602 11.3 mi
Thurmont 6,254 12.8 mi
Brunswick 8,450 13.8 mi
Boonsboro 3,809 14.4 mi

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

Cite this page

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

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