Decatur County IA Information


Decatur County Subdivisions

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


Total Population 8,654
Daytime Population: Workers 3,339
Daytime Population: Residents 4,810
Total Daytime Population (TDP) 8,149
Ratio TDP/Total Population1 0.94
Population in Households 7,889
Population in Familes 6,209
Population in Group Qrtrs 765
Population Density2 16
Diversity Index3 16


Median Household Income $43,077
Average Household Income $57,079
Per Capita Income $22,100


Total Housing Units 3,877 (100%)
Owner Occupied HU 2,220 (57.3%)
Renter Occupied HU 996 (25.7%)
Vacant Housing Units 661 (17.0%)
Median Home Value $89,571
Average Home Value $146,712


Total Households 3,216
Average Household Size 2.45
Family Households 2,046
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 0.32% -0.12%
Households -0.03% -0.26%
Families -0.2% -0.35%
Median Household Income   3.65%
Per Capita Income   2.79%


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, 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 # 86 14th
Population Density # 86 15th
Diversity Index # 47 54th
Median Household Income # 96 4th
Per Capita Income # 99 1st

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