Johnson County IA Information


Johnson County Subdivisions

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


Total Population 142,688
Population in Households 134,699
Population in Familes 89,446
Population in Group Qrtrs 7,989
Population Density1 232
Diversity Index2 38


Total Households 57,571
Average Household Size 2.34
Family Households 30,126
Average Family Size 3


Total Housing Units 61,087 (100%)
Owner Occupied HU 33,573 (55.0%)
Renter Occupied HU 23,998 (39.3%)
Vacant Housing Units 3,516 ( 5.8%)
Median Home Value $211,810
Average Home Value $252,445


Median Household Income $56,686
Average Household Income $78,455
Per Capita Income $32,171
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.39% 1.71%
Households 1.42% 1.78%
Families 1.25% 1.68%
Median Household Income   2.85%
Per Capita Income   1.99%
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.


Johnson County IA - Peer Comparisons by Rank and Percentile

The table below compares Johnson 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 # 4 97th
Population Density1 # 5 96th
Diversity Index2 # 9 92nd
Median Household Income # 13 88th
Per Capita Income # 3 98th

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