Johnson County IA Information


Johnson County Subdivisions

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


Total Population 151,506
Population in Households 142,977
Population in Familes 93,176
Population in Group Qrtrs 8,529
Population Density1 247
Diversity Index2 42


Median Household Income $61,398
Average Household Income $84,799
Per Capita Income $34,499


Total Housing Units 64,320 (100%)
Owner Occupied HU 35,832 (55.7%)
Renter Occupied HU 24,878 (38.7%)
Vacant Housing Units 3,610 ( 5.6%)
Median Home Value $221,625
Average Home Value $263,474


Total Households 60,710
Average Household Size 2.36
Family Households 31,534
Average Family Size 3
  1. Population Density = Total Population per square mile.
  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 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 1.79% 1.62%
Households 1.73% 1.64%
Families 1.5% 1.51%
Median Household Income   1.4%
Per Capita Income   1.6%


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, 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 # 4 97th
Population Density # 4 97th
Diversity Index # 8 92nd
Median Household Income # 10 91st
Per Capita Income # 3 98th

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