City · Maryland · United States
Glen Arm, MD — ZIP codes
1 ZIP code · Baltimore County
- City
- Glen Arm
- County
- Baltimore
- State
- Maryland
- Country
- United States
- Postal code
- 21057Single source
- Coordinates
- 39.4575, -76.5153 View on OpenStreetMap
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 21057 | Glen Arm | Single source |
Sources and verification
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · census-acs5. Last generated : 2026-08-21. Report an error.