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21057 ZIP Code

ZIP Code: 21057 Glen Arm

Extra Details of ZIP Code 21057

ZIP Code 21057
Zip Code Type Standard
State Maryland - MD
Official Zip Code Name Glen Arm
Primary County Baltimore
Area Code (s) 410
Racial Majority White 89.51%
Elevation Range 308 - 420 ft.

Data: State Statistics Office | Updated on: Jun 22, 2026

How to write a U.S. envelope?

The first step is to write the recipient address:
First, you need to fill in the recipient's mailing information in the center of the envelope. The first line is also the recipient's name. When writing the recipient's name, pay attention to the title, and write the person's title and name in the middle of the envelope. On the second line, write the recipient's full address, including any associated apartment or suite numbers. The more detailed the better. The third line writes the recipient's city, state, and zip code, this information is the last line of the address.

The second step is to write the reply address:
The return address is three lines, the first line will be the sender's name. The second line writes the sender's detailed address, including the street address, please remember to write the house number. On the third line write your city, state abbr, and zip code.

Finally, don't forget to stick the stamp on the right top corner. Otherwise, the letter will not go into the delivery process.

How to Read Zip Code

Population and Employment

population

4,109

Unemployment Rate
0.6%
Poverty Rate
2.5%
Non-Citizens
0.8%

Location of Zip Code 21057

On this map you can see exactly where postcodes are located within Germany.

Gender & Age Statistics

Gender

  • Male
    51%
  • Female
    49%

Age

  • <10 years
    13%
  • 10-17 years
    12%
  • 18-34 years
    10%
  • 35-64 years
    41%
  • 65+ years
    24%

21057 Demographics

Racial Diversity

  • White
    88%
  • African American
    4%
  • Hispanic
    5%
  • American Indian or Alaska native
    0%
  • Asian & Other race
    2%

Education Levels

  • Master's degree or above
    28%
  • Bachelor's degree
    24%
  • Some college or associate degree
    27%
  • High school diploma or vocational degree
    14%
  • Less than high school diploma
    7%

21057 Income

Median Household Income

$120,234

National $64,994

Household Income Brackets

  • <$30k
    9%
  • $30-$44k
    12%
  • $45-$84k
    5%
  • $85-$149k
    33%
  • $150k+
    41%

Median Individual Income

$58,342

National $32,197

Individual Income Brackets

  • <$20k
    18%
  • $20-$34k
    22%
  • $35-$74k
    43%
  • $75k+
    17%

Online Business Directory

Whether you're looking for hotels, hairdressers, doctors or lawyers in Glen Arm, MD. You can find these phone numbers in our phone book. With us, you can easily book a restaurant or hotel in your location. You can also find reputable real estate agents and insurance agents. Everything you need is easily accessible here!

Assisting Hands Home Care Baltimore
6 Reservoir Cir Suite 201,, Baltimore, 21208

Summer Breeze Farms
20568 Old Gravel, Lexington Park, 20653

Women’s Health Specialists
6301 Executive Blvd, Rockville, 20852

Teknika Kitchens and Baths
335 High Street, Unit C, Chestertown, 21620

PuroClean of Lanham
4720 Boston Way Unit l, Lanham, 20706

Mitaja Corporation
8115 Maple Lawn Blvd Suite 350, Fulton, 20759

Sunrise Solutions, Inc.
2014 Renard Ct suite m, Annapolis, 21401

Liz Viernes Photography
4617 Dustin Road, Burtonsville, 20866

Schools Serving Glen Arm

Library Glen Arm

Museum Glen Arm

Hospital Glen Arm

University Glen Arm