Gaithersburg, MD 20879 ZIP Code Profile

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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: 1,139
  • Single Family Addresses: 6,679
  • Multi-Family Addresses: 1,984
  • 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, 2017)


Total Population 26,262
Daytime Population: Workers 14,743
Daytime Population: Residents 11,667
Total Daytime Population (TDP) 26,410
Ratio TDP/Total Population1 1.01
Population in Households 26,133
Population in Familes 21,813
Population in Group Qrtrs 129
Population Density2 3,308
Diversity Index3 84


Median Household Income $89,013
Average Household Income $104,271
Per Capita Income $34,785


Total Housing Units 9,008 (100%)
Owner Occupied HU 6,346 (70.4%)
Renter Occupied HU 2,370 (26.3%)
Vacant Housing Units 292 ( 3.2%)
Median Home Value $331,669
Average Home Value $359,478


Total Households 8,716
Average Household Size 3.0
Family Households 6,276
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood 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.


2010-2017 2017-2022
Population 0.75% 0.8%
Households 0.66% 0.72%
Families 0.52% 0.64%
Median Household Income   1.79%
Per Capita Income   2.17%

Gaithersburg, MD 20879 - Peer Comparisons by Rank and Percentile

The table below compares 20879 to the other 456 ZIP Codes in Maryland by rank and percentile using July 1, 2017 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 # 97 79th
Population Density # 72 84th
Diversity Index # 14 97th
Median Household Income # 169 63rd
Per Capita Income # 242 47th

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

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