Washington County RI Information


Washington County Subdivisions

Washington County RI Data & Demographics (As of July 1, 2020)


Total Population 131,778 (100%)
Population in Households 124,731 (94.7%)
Population in Families 98,823 (75.0%)
Population in Group Quarters1 7,047 ( 5.3%)
Population Density 400
Diversity Index2 21


Median Household Income $90,899
Average Household Income $116,451
% of Income for Mortgage4 16%
Per Capita Income $45,699
Wealth Index5 163


Total HU (Housing Units) 65,530 (100%)
Owner Occupied HU 38,797 (59.2%)
Renter Occupied HU 12,760 (19.5%)
Vacant Housing Units 13,973 (21.3%)
Median Home Value $342,058
Average Home Value $427,014
Housing Affordability Index3 136


Total Households 51,557
Average Household Size 2.42
Family Households 33,473
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.


2010-2020 2020-2025
Population 0.36% 0.29%
Households 0.46% 0.39%
Families 0.35% 0.31%
Median Household Income   1.62%
Per Capita Income   1.85%
Owner Occupied HU   0.42%


Washington County RI - Peer Comparisons by Rank and Percentile

The table below compares Washington County to the other 5 counties and county equivalents in Rhode Island by rank and percentile using July 1, 2020 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 # 3 60th
Population Density # 5 20th
Median Household Income # 1 100th
Housing Affordability Index # 5 100th
Per Capita Income # 2 80th
Diversity Index # 4 40th

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

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  5. See the Rhode Island COVID-19 Data and US COVID-19 Data for more information on the spread of the novel coronavirus.