Potomac, MD Profile: Facts & Data


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Potomac, Maryland - Basic Facts

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The Potomac CDP(1) had a population of 45,425 as of July 1, 2021.

The primary coordinate point for Potomac is located at latitude 39.0182 and longitude -77.2086 in Montgomery County. The formal boundaries for the Potomac Census Designated Place encompass a land area of 25.13 sq. miles and a water area of 1.45 sq. miles. Montgomery County is in the Eastern time zone (GMT -5). The elevation is 361 feet.

The Potomac Census Designated Place has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Potomac Census Designated Place is located within District 10, a minor civil division (MCD) of Montgomery County.

Alternate Unofficial Names for Potomac: Offutts Cross Road, Offutt's Crossroads, Section Eight.

  1. A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

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  1. Potomac 2021 Demographic Data
  2. Growth Rates for Potomac (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Maryland Research Tools (Easy Tools & Current Data)
  3. Maryland Data Comparison Tool - 2021 Demographics

Potomac, MD Data & Demographics (As of July 1, 2021)


Total Population 45,425 (100%)
Population in Households 44,951 (99.0%)
Population in Families 40,529 (89.2%)
Population in Group Quarters1 474 ( 1.0%)
Population Density 1,807
Diversity Index2 56


Median Household Income $200,001
Average Household Income $276,197
% of Income for Mortgage4 20%
Per Capita Income $98,589
Wealth Index5 416


Total HU (Housing Units) 16,974 (100%)
Owner Occupied HU 14,114 (83.2%)
Renter Occupied HU 2,177 (12.8%)
Vacant Housing Units 683 ( 4.0%)
Median Home Value $945,078
Average Home Value $1,050,806
Housing Affordability Index3 117


Total Households 16,291
Average Household Size 2.76
Family Households 13,167
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2021 2021-2026
Population 0.09% 0.17%
Households 0.1% 0.12%
Families 0.07% 0.13%
Median Household Income   0.0%
Per Capita Income   1.48%
Owner Occupied HU   0.28%

Potomac, MD - Peer Comparisons by Rank and Percentile

The table below compares Potomac to the other 518 incorporated cities, towns and CDPs in Maryland by rank and percentile using July 1, 2021 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 # 20 96th
Population Density # 210 60th
Median Household Income # 12 100th
Housing Affordability Index # 116 22nd
Per Capita Income # 12 98th
Diversity Index # 150 71st

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

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