Gaithersburg, MD 20879 ZIP Code Profile

Related Place Profiles:
Gaithersburg, MD | Montgomery Village, MD

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ZIP Code 20879: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Gaithersburg, MD 20879

Acceptable Alternative
Montgomery Village, MD 20879
Montgomry Vlg, MD 20879

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 1,099
  • Single Family Addresses: 6,646
  • Multi-Family Addresses: 1,949
  • County: Montgomery County
  • Centroid: Latitude 39.178, Longitude -77.194
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


20879 ZIP Code Map

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Gaithersburg, MD 20879 Data & Demographics (As of July 1, 2015)


Total Population 18,483
Population in Households 18,467
Population in Familes 16,010
Population in Group Qrtrs 16
Population Density1 4,531
Diversity Index2 84


Total Households 5,748
Average Household Size 3.21
Family Households 4,516
Average Family Size 4


Total Housing Units 6,041 (100%)
Owner Occupied HU 4,585 (75.9%)
Renter Occupied HU 1,163 (19.3%)
Vacant Housing Units 293 ( 4.9%)
Median Home Value $328,172
Average Home Value $355,387


Median Household Income $94,313
Average Household Income $113,936
Per Capita Income $35,448
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.04% 0.41%
Households 0.01% 0.37%
Families -0.11% 0.33%
Median Household Income   1.94%
Per Capita Income   2.05%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


Gaithersburg, MD 20879 - Peer Comparisons by Rank and Percentile

The table below compares 20879 to the other 440 ZIP Codes in Maryland by rank and percentile using July 1, 2015 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 128 71st
Population Density1 # 51 89th
Diversity Index2 # 14 97th
Median Household Income # 132 70th
Per Capita Income # 226 49th

Additional comparisons and rankings can be made with a VERY EASY TO USE Maryland Census Data Comparison Tool.