Johnson County IA Information


Johnson County Subdivisions

Johnson County IA Data & Demographics (As of July 1, 2017)


Total Population 147,657
Daytime Population: Workers 87,455
Daytime Population: Residents 69,185
Total Daytime Population (TDP) 156,640
Ratio TDP/Total Population1 1.06
Population in Households 139,642
Population in Familes 92,343
Population in Group Qrtrs 8,015
Population Density2 241
Diversity Index3 40


Median Household Income $57,517
Average Household Income $79,219
Per Capita Income $32,443


Total Housing Units 62,683 (100%)
Owner Occupied HU 34,821 (55.6%)
Renter Occupied HU 24,717 (39.4%)
Vacant Housing Units 3,145 ( 5.0%)
Median Home Value $214,083
Average Home Value $255,147


Total Households 59,538
Average Household Size 2.35
Family Households 30,993
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 1.68% 1.55%
Households 1.69% 1.59%
Families 1.47% 1.46%
Median Household Income   1.59%
Per Capita Income   2.17%


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, 2017 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 93rd
Median Household Income # 16 85th
Per Capita Income # 3 98th

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