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/UNION-BRIDGE

Union Bridge ZIP code, Maryland

The ZIP code for Union Bridge, MD is 21791, and its area codes are 443, 410 and 667.

USPS city name
1 ZIP code
Population
1,055
Area codes
443, 410, 667

Union Bridge in numbers

About 1,055 people live in Union Bridge, in 468 households. The median household income is $76,250 a year, 26% below the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $293,300 (30% below the Maryland median), and median gross rent is $1,118 a month. The median age is 35.3; 26.5% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 36 minutes.

Population1,055Union Bridge1,055
Households468Union Bridge468
Median age35.3Union Bridge35.3Maryland39.4US 38.9
Median household income$76,250Union Bridge$76,250Maryland$103,678US $80,734
Median home value$293,300Union Bridge$293,300Maryland$419,900US $332,700
Median gross rent$1,118Union Bridge$1,118Maryland$1,705US $1,413
Bachelor's degree or higher26.5%Union Bridge26.5%Maryland43.4%US 35.7%
Mean commute36.0 minUnion Bridge36.0 minMaryland31.1 minUS 26.4 min
Population density930 / sq miUnion Bridge930 / sq mi

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

ZIP codes addressed as Union Bridge

ZIP codes with the USPS city name Union Bridge
ZIP City Type Population Median income Median home
21791 Union Bridge , MD Standard 5,340 $93,015 $379,800

Map of Union Bridge ZIP codes

21791

The ZIP codes of Union Bridge, 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 Union Bridge

The nearest larger towns are New Windsor (1,400 people, 4.4 mi), Taneytown (7,932 people, 6.0 mi) and Libertytown (1,346 people, 7.2 mi).

Towns near Union Bridge
TownPopulationDistance
Taneytown 7,932 6.0 mi
Westminster 20,445 8.9 mi
Walkersville 6,414 12.2 mi
Emmitsburg 2,845 12.2 mi
Linganore 14,444 12.9 mi
Littlestown, PA 4,850 12.9 mi
Thurmont 6,254 13.0 mi
Mount Airy 9,805 13.6 mi
Spring Ridge 5,922 14.5 mi
Monrovia 3,568 15.6 mi
Bartonsville 3,282 15.8 mi
Frederick 83,395 16.0 mi
Green Valley 13,602 16.2 mi
Manchester 5,439 16.2 mi

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

Cite this page

zipcodes.pro. “Union Bridge, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/union-bridge

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