ZIP Code 21757
Keymar · Carroll, Maryland
21757 is the ZIP code of Keymar in Carroll, Maryland, United States.
- ZIP Code
- 21757
- County
- Carroll
- State
- Maryland
- Country
- United States
Place with ZIP code 21757
| Place | County | Location |
|---|---|---|
| Keymar | Carroll | 39.566, -77.282 |
Near Baltimore
The nearest major city is Baltimore, about 65 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 21757?
Keymar.
Which county and state is 21757 in?
Carroll, Maryland, United States.
What is the nearest major city to 21757?
Baltimore, about 65 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.