Washington County IA Information


Washington County Subdivisions

Washington County IA Data & Demographics (As of July 1, 2018)


Total Population 22,677
Population in Households 22,367
Population in Familes 18,100
Population in Group Qrtrs 310
Population Density2 40
Diversity Index3 21


Median Household Income $56,149
Average Household Income $68,759
Per Capita Income $27,970


Total Housing Units 10,003 (100%)
Owner Occupied HU 6,530 (65.3%)
Renter Occupied HU 2,628 (26.3%)
Vacant Housing Units 845 ( 8.4%)
Median Home Value $148,467
Average Home Value $178,538


Total Households 9,158
Average Household Size 2.44
Family Households 6,076
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 0.53% 0.53%
Households 0.57% 0.56%
Families 0.41% 0.47%
Median Household Income   2.02%
Per Capita Income   2.61%


Washington County IA - Peer Comparisons by Rank and Percentile

The table below compares Washington County to the other 99 counties and county equivalents in Iowa by rank and percentile using July 1, 2018 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 # 27 74th
Population Density # 28 73rd
Diversity Index # 31 70th
Median Household Income # 24 77th
Per Capita Income # 56 44th

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