ZIP code 21057
Where is ZIP code 21057?
Glen Arm, Maryland
Baltimore County · Standard ZIP code
ZIP code 21057 belongs to Glen Arm, Maryland in Baltimore County. 21057 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 410, 443 and 667. About 4,386 people live in the 21057 area, where the median household income is $145,924. The closest ZIP codes are 21092 (Long Green, 1.1 mi north), 21082 (Hydes, 2.7 mi northeast) and 21051 (Fork, 3.7 mi east).
| ZIP code | 21057 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Glen Arm |
| State | Maryland (MD) |
| County | Baltimore County |
| Time zone | Eastern Time · now |
| Area codes | 410, 443, 667 |
| Coordinates | 39.4575, -76.5153 map |
| 3-digit prefix | 210 |
Population and income in 21057
| Population | 4,386 · lower than 53% of Maryland ZIP codes |
|---|---|
| People per square mile | 276 · lower than 57% of Maryland ZIP codes |
| Median age | 41.3 years · lower than 54% of Maryland ZIP codes |
| Men / women | 50% / 51% |
| Median household income | $145,924 · higher than 79% of Maryland ZIP codes |
| Income per person | $61,920 |
| Below the poverty line | 3.1% |
| Bachelor’s degree or higher | 54% of adults 25+ |
| Median home value | $623,200 · higher than 85% of Maryland ZIP codes |
| Median rent | $1,746 a month |
| Housing units | 1,603 |
| Households | 1,545 (2.82 people on average) |
| Owners / renters | 85% / 15% |
| Land area | 15.89 sq mi (plus 0.44 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 21057. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 21057
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21092 | Long Green, MD | 1.1 mi N | PO Box only |
| 21082 | Hydes, MD | 2.7 mi NE | Standard |
| 21051 | Fork, MD | 3.7 mi E | Standard |
| 21131 | Phoenix, MD | 3.8 mi NW | Standard |
| 21094 | Lutherville Timonium, MD | 4.3 mi W | PO Box only |
| 21286 | Towson, MD | 4.4 mi SW | Standard |
| 21013 | Baldwin, MD | 4.4 mi N | Standard |
| 21236 | Nottingham, MD | 4.8 mi S | Standard |
| 21234 | Parkville, MD | 5 mi S | Standard |
| 21128 | Perry Hall, MD | 5.2 mi SE | Standard |
| 21087 | Kingsville, MD | 5.4 mi E | Standard |
| 21204 | Towson, MD | 5.9 mi SW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21057 or measure the distance to another ZIP code.
How to address mail to 21057
123 MAIN ST
GLEN ARM MD 21057
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21057-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21057?
- 21057 is a Glen Arm, Maryland ZIP code.
- What county is 21057 in?
- ZIP code 21057 is in Baltimore County, Maryland.
- What time zone is ZIP code 21057 in?
- 21057 is in the Eastern Time zone (America/New_York).
- What area code is 21057?
- Phone numbers in ZIP code 21057 use area codes 410, 443 and 667.
- What is the population of ZIP code 21057?
- About 4,386 people live in ZIP code 21057, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 21057?
- The median household income in 21057 is $145,924 a year, higher than 79% of Maryland ZIP codes.
- What ZIP codes are near 21057?
- The nearest ZIP codes to 21057 are 21092 (Long Green, 1.1 miles), 21082 (Hydes, 2.7 miles), 21051 (Fork, 3.7 miles) and 21131 (Phoenix, 3.8 miles).