Cabin John, MD 20818 ZIP Code Profile

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Cabin John, MD

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ZIP Code 20818: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Cabin John, MD 20818

  • ZIP Code Type: STANDARD
  • Businesses Addresses: 138
  • Single Family Addresses: 647
  • Multi-Family Addresses: 29
  • County: Montgomery County
  • Centroid: Latitude 38.976, Longitude -77.16
  • 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.


20818 ZIP Code Map

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Cabin John, MD 20818 Data & Demographics (As of July 1, 2017)


Total Population 1,383
Daytime Population: Workers 237
Daytime Population: Residents 543
Total Daytime Population (TDP) 780
Ratio TDP/Total Population1 0.56
Population in Households 1,383
Population in Familes 1,172
Population in Group Qrtrs 0
Population Density2 1,515
Diversity Index3 43


Median Household Income $200,001
Average Household Income $258,622
Per Capita Income $103,037


Total Housing Units 569 (100%)
Owner Occupied HU 486 (85.4%)
Renter Occupied HU 65 (11.4%)
Vacant Housing Units 18 ( 3.2%)
Median Home Value $880,000
Average Home Value $899,537


Total Households 551
Average Household Size 2.51
Family Households 404
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 0.62% 0.71%
Households 0.54% 0.61%
Families 0.35% 0.54%
Median Household Income   0.0%
Per Capita Income   1.34%

Cabin John, MD 20818 - Peer Comparisons by Rank and Percentile

The table below compares 20818 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 # 332 27th
Population Density # 130 71st
Diversity Index # 205 55th
Median Household Income # 2 100th
Per Capita Income # 2 100th

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

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