| ZIP Code | 21057 |
|---|---|
| City | Glen Arm |
| State | Maryland (MD) |
| County | Baltimore County |
| Area Code | 410/443/667 |
| Elevation | 292 ft |
| Latitude | 39.448749 |
|---|---|
| Longitude | -76.512474 |
| Timezone | New York (DST) |
| FIPS | 24005 |
| ZIP Type | Standard |
| Status | Active |
Race & Ethnicity
Age Breakdown
Key Indicators
| Median Age | 42.7 yrs ↓ 17% since 2019 |
|---|---|
| Avg Household Size | 2.85 |
| Below Poverty | 1.5% ▼ 85% below avg |
| College Grads | 68.9% ▲ 78% above avg |
| Unemployment | 1.7% ▼ 64% below avg |
| HS Graduate | 450 (15.6%) |
| Some College | 194 (6.7%) |
| Associates | 254 (8.8%) |
| Bachelors | 308 (10.7%) |
| Graduate Degree | 1,681 (58.2%) |
Education
Housing Tenure
Home Value Distribution
Financials
| Median HH Income | $170,417 ▲ 123% above avg ↑ 30% since 2019 |
|---|---|
| Median Home Value | $609,000 ▲ 118% above avg ↑ 24% since 2019 |
| Home/Income Ratio | 3.6x (nat avg ~3.5x) |
| Median Rent | $1,672/mo |
| Total Units | 1,664 |
| Vacant Units | 108 |
| Avg HH Size | 2.85 |
Income Distribution
How People Get to Work
Commute Time
Year Built
Summary
| Total Units | 1,664 |
|---|---|
| Vacant | 108 |
| Owner Occupied | 86.6% |
| Renter Occupied | 13.4% |
| Avg HH Size | 2.85 |
ZIP code 21057 is located in Glen Arm, Maryland, within Baltimore County. With a population of 4,463, this is a lightly populated ZIP code with a middle-aged community — the median age is 42.7 years. Economically, 21057 is a affluent ZIP code: the median household income of $170,417 is more than double the national average.
Real estate in ZIP code 21057 represents a premium housing market. The median home value of $609,000 is more than double the national average. Renters can expect to pay around $1,672 per month in median rent. Homeownership is strong here — 86.6% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 24% since 2019.
The population of 21057 is primarily White (83.44%). Residents are highly educated — 68.9% hold a bachelor's degree or higher, which is significantly above the national average. Poverty affects a relatively small share of residents at 1.5%. Household income has grown by 30% since 2019.
The unemployment rate in 21057 stands at 1.7%, which is well below the national average. About 17% of workers are remote. As in most parts of the country, driving alone is the dominant commute mode at 76%.
Overall, ZIP code 21057 in Glen Arm, MD is characterized as affluent, highly educated, a middle-aged community, and predominantly owner-occupied. With 4,463 residents, a median household income of $170,417, and a median home value of $609,000, it offers a clear picture of life in this part of Maryland.