ZIP Code 21057 - Glen Arm Maryland

ZIP Code 21057 is located in Glen Arm Maryland. Portions of 21057 are also in Carney and Hampton and Perry Hall. 21057 is entirely within Baltimore County. Regionally, 21057 is located in Metro Baltimore.

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ZIP Code 21057 Quick Stats

ZIP Code NameGlen Arm
Primary CountyBaltimore County
ZIP Code TypeStandard
Population (2022)4,530
Area Code(s)410 / 443 / 667
Current Time

ZIP Code 21057 Map

21057 Demographics

21057 can be classified socioeconomically as Middle Class class compared to other ZIP Codes in Maryland based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 21057 is White. The current unemployment level in 21057 is 2.7%.

Population Growth Rate0.00%
Population Density293 People per Square Mile
Total Households1,549
Percentage High Income Households15.7%
Median Household Income (2021)$131,184
Average Adjusted Gross Income (2021)$412,050
Current Unemployment Rate (July 2024)2.7%
Majority Race/EthnictyWhite - 91.22%

21057 Race/Ethnicty Breakdown

Native American90.19%
Hawaiian/Pac. Islander00%

21057 Educational Attainment Levels

Highest Education Level AttainedTotalPercentage
Less Than 1 Year of College1174.35%
Bachelor Degree74827.8%
High School Diploma48417.99%
No High School Diploma612.27%
GED or Alternate602.23%
1 or More Years of College36013.38%
Associates Degree1656.13%
Masters Degree40114.9%
Professional Degree2328.62%
Doctorate Degree632.34%

21057 Geography

Adjacent ZIP Codes
Cities/Towns in 21057
RegionMetro Baltimore
Metropolitan/Micropolitan Stat AreaBaltimore-Columbia-Towson, MD
Time ZoneEastern Daylight Time
IANA TimezoneAmerica/New_York
Area15 Square Miles

21057 Politics

US Congressional Districts in 21057
Maryland State Senate Districts in 21057
Maryland State House of Delegates Districts in 21057

21057 Weather and Climate Data

Plant Hardiness ZoneZone 7a: 0F to 5F
Average First Frost DateOctober 21 - 31
Average Last Frost DateApril 11 - 20
Koppen-Geiger Climate ZoneCfa - Humid Subtropical Climate
Ecoregion64c - Piedmont Uplands

21057 Annual Climate Data

Avg Min Temp (°F)24263342526166655846362845
Avg Max Temp (°F)41455565758387867968564666
Avg Precip (In.)3.793.124.423.

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