Zip Code Database List
Account Login
Find ZIP+4 of Address

Find the ZIP Code, County, and +4 of any U.S. Address

FREE ZIP Code Finder

Find info on any U.S. ZIP Code

Other FREE Lookups

Lookup ZIP Code of any City, State, County or Area Code

FREE Radius Search

Find all ZIP Codes

FREE Distance Calc

Calculate the distance between two U.S. or Canadian ZIP codes.

ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

Zip Code 21770, Monrovia, MD

ZIP Code 21770 Details

Zip Code:21770
State:MD [Maryland]
Multi County:No
City Alias(es):Monrovia
Area Code:240 / 301
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Eastern (GMT -05:00)
Observes Daylight Saving:Yes
Elevation:604 ft
State FIPS:24
County FIPS:021
Division:South Atlantic
Intro Date:<2004-10

ZIP Code 21770 2020 Census Demographics

Current Population:8,885
2020 Population:7,575
Households per ZIP Code:2,511
Average House Value:$498,100
Avg. Income Per Household:$159,091
Persons Per Household:3.01
White Population:5,700
Black Population:446
Hispanic Population:661
Asian Population:529
American Indian Population:23
Hawaiian Population:0
Other Population:243
Male Population:3,769
Female Population:3,806
Median Age:39.50 years
Male Median Age:38.80 years
Female Median Age:39.80 years

ZIP Code 21770 Other Demographics

# Residential Mailboxes:2,952
# Business Mailboxes:86
Total Delivery Receptacles:3,664
Number of Businesses:138
1st Quarter Payroll:$17,322,000
Annual Payroll:$77,969,000
# of Employees:1,496
Water Area:0.01 sq mi
Land Area:11.45 sq mi
118th Congressional District:06
118th Congressional Land Area:1950.26 sq mi
Single Family Delivery Units:1,873
Multi Family Delivery Units:0
# Residential Mailboxes:2,952
# Business Mailboxes:86
Total Delivery Receptacles:3,664

ZIP Code 21770 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 995 1,040 +45
Retired Workers: 770 815 +45
Disabled Workers: 65 65 0
Widow(er)s and Parents: 60 65 +5
Spouses: 40 40 0
Children: 60 55 -5
65+: 810 875 +65
Monthly Benefits - All: $1,580,000 $1,713,000 +$133,000
Monthly Benefits - Retired Workers: $1,296,000 $1,408,000 +$112,000
Monthly Benefits - Widow(ers): $92,000 $106,000 +$14,000

ZIP Code 21770 Statistical Areas

CBSA: 47900
CBSA Name: Washington-Arlington-Alexandria, DC-VA-MD-WV
CBSA Type: Metro
CBSA Division: 23224
CBSA Division Name: Frederick-Gaithersburg-Rockville, MD
CBSA Population:0
CBSA Division Population:0
MSA: 8872
MSA Name: Washington-Baltimore, DC-MD-VA-WV CMSA
PMSA: 8840
PMSA Name: Washington, DC-MD-VA-WV PMSA
City State Key:V23990
Preferred Last Line Key:V23990
21769: Previous ZIP Code
Next ZIP Code: 21771


  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],