ZIP Code 21791
Union Bridge · Carroll, Maryland
21791 is the ZIP code of Union Bridge in Carroll, Maryland, United States.
- ZIP Code
- 21791
- County
- Carroll
- State
- Maryland
- Country
- United States
Place with ZIP code 21791
| Place | County | Location |
|---|---|---|
| Union Bridge | Carroll | 39.580, -77.132 |
Near Baltimore
The nearest major city is Baltimore, about 55 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 21791?
Union Bridge.
Which county and state is 21791 in?
Carroll, Maryland, United States.
What is the nearest major city to 21791?
Baltimore, about 55 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.