Glen Arm, MD ZIP code
The ZIP code for Glen Arm, Maryland is 21057. It is in Baltimore County.
- Population in these ZIPs
- 4,386
- Avg. median income
- $145,900population-weighted
- Typical home value
- $644,200population-weighted
- Metro area
- Baltimore-Columbia-Towson, MD
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Glen Arm, MD ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 21057 | 4,386 | $145,924 | $644,200 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Glen Arm
- Hydes 3 mi
- Fork 3 mi
- Parkville 4 mi
- Nottingham 4 mi
- Baldwin 4 mi
- Perry Hall 5 mi
- Kingsville 5 mi
- Phoenix 6 mi
- Lutherville Timonium 6 mi
- Upper Falls 6 mi
- Towson 6 mi
- Fallston 7 mi
Frequently asked questions
What is the ZIP code for Glen Arm, MD?
The ZIP code for Glen Arm, MD is 21057.
What county is Glen Arm, Maryland in?
Glen Arm ZIP codes are in Baltimore County.