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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

Zip Code 21791, Union Bridge, MD

ZIP Code 21791 Details

Zip Code:21791
City:Union Bridge
State:MD [Maryland]
Counties:CARROLL, MD
Multi County:Yes
City Alias(es):Union Bridge
Area Code:443 / 410 / 667
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Eastern (GMT -05:00)
Observes Daylight Saving:Yes
Elevation:512 ft
State FIPS:24
County FIPS:013
Division:South Atlantic
Intro Date:<2004-10

ZIP Code 21791 2020 Census Demographics

Current Population:4,832
2020 Population:5,292
Households per ZIP Code:1,976
Average House Value:$326,600
Avg. Income Per Household:$93,578
Persons Per Household:2.68
White Population:4,790
Black Population:120
Hispanic Population:122
Asian Population:47
American Indian Population:9
Hawaiian Population:0
Other Population:55
Male Population:2,648
Female Population:2,644
Median Age:42.00 years
Male Median Age:42.30 years
Female Median Age:41.50 years

ZIP Code 21791 Other Demographics

# Residential Mailboxes:1,803
# Business Mailboxes:29
Total Delivery Receptacles:2,126
Number of Businesses:97
1st Quarter Payroll:$9,158,000
Annual Payroll:$43,180,000
# of Employees:684
Water Area:0.08 sq mi
Land Area:46.04 sq mi
118th Congressional District:02|06
118th Congressional Land Area:348.88|1950.26 sq mi
Single Family Delivery Units:1,763
Multi Family Delivery Units:21
# Residential Mailboxes:1,803
# Business Mailboxes:29
Total Delivery Receptacles:2,126

ZIP Code 21791 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 1,125 1,150 +25
Retired Workers: 840 880 +40
Disabled Workers: 125 110 -15
Widow(er)s and Parents: 55 60 +5
Spouses: 30 30 0
Children: 75 70 -5
65+: 890 925 +35
Monthly Benefits - All: $1,598,000 $1,705,000 +$107,000
Monthly Benefits - Retired Workers: $1,277,000 $1,399,000 +$122,000
Monthly Benefits - Widow(ers): $83,000 $83,000 $0

ZIP Code 21791 Statistical Areas

CBSA: 12580
CBSA Name: Baltimore-Columbia-Towson, MD
CBSA Type: Metro
CBSA Division: 
CBSA Division Name: 
CBSA Population:2,710,489
CBSA Division Population:0
MSA: 8872
MSA Name: Washington-Baltimore, DC-MD-VA-WV CMSA
PMSA: 0720
PMSA Name: Baltimore, MD PMSA
City State Key:V24530
Preferred Last Line Key:V24530
21790: Previous ZIP Code
Next ZIP Code: 21792


  1. U.S. Postal Service [Last Updated: 6/1/2023],
  2. Internal Data Creation [Last Updated: 6/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census American National Standards Institute (ANSI) [Last Updated: 6/1/2023],
  6. U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023],
  7. Centers for Medicare & Medicaid Services [Updated Yearly],