Decatur County IA Information


Decatur County Subdivisions

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


Total Population 8,434
Population in Households 7,669
Population in Familes 5,980
Population in Group Qrtrs 765
Population Density1 16
Diversity Index2 16


Median Household Income $42,492
Average Household Income $59,340
Per Capita Income $23,096


Total Housing Units 3,834 (100%)
Owner Occupied HU 2,162 (56.4%)
Renter Occupied HU 991 (25.8%)
Vacant Housing Units 681 (17.8%)
Median Home Value $91,726
Average Home Value $148,451


Total Households 3,153
Average Household Size 2.43
Family Households 2,005
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 -0.03% -0.55%
Households -0.27% -0.66%
Families -0.42% -0.77%
Median Household Income   1.24%
Per Capita Income   1.64%


Decatur County IA - Peer Comparisons by Rank and Percentile

The table below compares Decatur 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 # 86 14th
Population Density # 87 13th
Diversity Index # 44 57th
Median Household Income # 98 2nd
Per Capita Income # 98 2nd

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