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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

Zip Code 20878, Gaithersburg, MD

ZIP Code 20878 Details

Zip Code:20878
State:MD [Maryland]
Multi County:No
City Alias(es):Gaithersburg
N Potomac
No Potomac
North Potomac
Area Code:301 / 240
City Type:P [Post Office]
Classification: [Non-Unique]
Time Zone:Eastern (GMT -05:00)
Observes Daylight Saving:Yes
Elevation:394 ft
State FIPS:24
County FIPS:031
Division:South Atlantic
Intro Date:<2004-10

ZIP Code 20878 2010 Census Demographics

Current Population:69,960
2010 Population:62,446
Households per ZIP Code:22,268
Average House Value:$567,900
Avg. Income Per Household:$127,957
Persons Per Household:2.80
White Population:38,936
Black Population:6,538
Hispanic Population:7,284
Asian Population:15,715
American Indian Population:395
Hawaiian Population:98
Other Population:3,241
Male Population:30,376
Female Population:32,070
Median Age:38.20 years
Male Median Age:37.20 years
Female Median Age:39.00 years

ZIP Code 20878 Other Demographics

# Residential Mailboxes:24,986
# Business Mailboxes:1,085
Total Delivery Receptacles:28,508
Number of Businesses:1998
1st Quarter Payroll:$451,058,000
Annual Payroll:$1,752,836,000
# of Employees:23,636
Water Area:0.391 sq mi
Land Area:21.911 sq mi
113th Congressional District:06|08
113th Congressional Land Area:1950.26|859.85 sq mi
Single Family Delivery Units:12,030
Multi Family Delivery Units:6,951
# Residential Mailboxes:24,986
# Business Mailboxes:1,085
Total Delivery Receptacles:28,508

ZIP Code 20878 Social Security Benefits

  2018 2019 Delta
Total Beneficiaries: 7,470 7,730 +260
Retired Workers: 5,810 6,085 +275
Disabled Workers: 455 455 0
Widow(er)s and Parents: 355 345 -10
Spouses: 520 525 +5
Children: 330 320 -10
65+: 6,455 6,740 +285
Monthly Benefits - All: $12,120,000 $13,096,000 +$976,000
Monthly Benefits - Retired Workers: $10,074,000 $11,057,000 +$983,000
Monthly Benefits - Widow(ers): $566,000 $560,000 ($6,000)

ZIP Code 20878 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:5,582,170
CBSA Division Population:1,205,162
MSA: 8872
MSA Name: Washington-Baltimore, DC-MD-VA-WV CMSA
PMSA: 8840
PMSA Name: Washington, DC-MD-VA-WV PMSA
City State Key:V23524
Preferred Last Line Key:V23524
20877: Previous ZIP Code
Next ZIP Code: 20879


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  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: 5/1/2022],
  6. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],
  7. Centers for Medicare & Medicaid Services [Updated Yearly],