Checked
ZIP Code 21791
Union Bridge, MD, Frederick County
Population
5,340
Land area
46sq mi
People per sq mi
116
City
Union Bridge
ZIP 21791 and nearby ZIP codes
ZIP 21791 at a glance
- ZIP 21791 (Union Bridge) is 82% less dense than Maryland as a whole.
- The median household income is $93,015, 10% below the Maryland median of $103,678.
- A typical owner-occupied home is valued at $379,800 (10% below Maryland) and median rent is $1,457 a month.
Local data for ZIP 21791
Counts from official public data
Housing and community stats
ZIP 21791, American Community Survey 2020-2024
Median household income
$93,015
Poverty rate
5.1%
Median home value
$379,800
Prices +0.7% in a year
Median rent
$1,457/mo
Homeownership
81.7%
Bachelor's or higher
26.7%
Median age
37.7
Average commute
37.3 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
98
ZIP Business Patterns 2023
Employees
868
$40.87M annual payroll
PPP loans
$5.45M
86 loans
Campaign donations
$8,399
8% D, 13% R, 2026 cycle
Environment and hazard risk
ZIP 21791, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: winter weather
Storm events since 1996
1,546
Countywide, mostly thunderstorm wind
Flood insurance policies
501
0.6% of homes, county
July high / Jan low
85° / 22°F
46.6 inches of rain a year
Health statistics
Share of adults in ZIP 21791, CDC PLACES estimates
Obesity
37.5%
U.S. 33.3% +4.2 pts
Diabetes
11.1%
U.S. 12.1% -1.0 pts
Smoking
12.4%
U.S. 12.8% about the same
Uninsured (18-64)
7.2%
U.S. 11.1% -3.9 pts
Cities in ZIP 21791
ZIP codes near 21791
| Name | Distance | Land area (sq mi) |
|---|---|---|
| 21798Woodsboro | 2.9 mi | 16.3 |
| 21762Libertytown | 4.7 mi | 0.4 |
| 21757Woodsboro | 5.2 mi | 35.2 |
| 21776New Windsor | 5.4 mi | 35.4 |
| 21701Libertytown | 6.8 mi | 39.7 |
| 21793Walkersville | 8.2 mi | 21.4 |
| 21787Taneytown | 8.6 mi | 61.1 |
| 21778Graceham | 9.3 mi | 18.2 |
| 21774Linganore | 9.8 mi | 14.2 |
| 21771Mount Airy | 10 mi | 89.5 |
| 21158Westminster | 10 mi | 73.3 |
| 21157Westminster | 11 mi | 77.7 |
Frequently asked questions
- What city is ZIP code 21791?
- ZIP code 21791 is in Union Bridge, MD (Frederick County).
- What county is ZIP code 21791 in?
- ZIP code 21791 is mostly in Frederick County, Maryland.
- How many people live in ZIP code 21791?
- About 5,340 people live in the 21791 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.