Washington County IA Information


Washington County Subdivisions

Washington County IA Data & Demographics (As of July 1, 2016)


Total Population 22,448
Population in Households 22,138
Population in Familes 18,098
Population in Group Qrtrs 310
Population Density1 40
Diversity Index2 20


Total Households 9,150
Average Household Size 2.42
Family Households 6,103
Average Family Size 3


Total Housing Units 10,026 (100%)
Owner Occupied HU 6,758 (67.4%)
Renter Occupied HU 2,392 (23.9%)
Vacant Housing Units 876 ( 8.7%)
Median Home Value $136,679
Average Home Value $166,673


Median Household Income $54,023
Average Household Income $64,991
Per Capita Income $26,696
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.54% 0.54%
Households 0.73% 0.67%
Families 0.61% 0.6%
Median Household Income   2.03%
Per Capita Income   2.0%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


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, 2016 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 # 28 73rd
Population Density1 # 29 73rd
Diversity Index2 # 30 71st
Median Household Income # 23 78th
Per Capita Income # 50 51st

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