Polk County IA Information


Polk County Subdivisions

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


Total Population 474,867
Population in Households 465,179
Population in Familes 364,829
Population in Group Qrtrs 9,688
Population Density1 828
Diversity Index2 40


Total Households 185,934
Average Household Size 2.5
Family Households 117,358
Average Family Size 3


Total Housing Units 198,227 (100%)
Owner Occupied HU 125,205 (63.2%)
Renter Occupied HU 60,729 (30.6%)
Vacant Housing Units 12,293 ( 6.2%)
Median Home Value $173,392
Average Home Value $202,758


Median Household Income $61,633
Average Household Income $81,426
Per Capita Income $32,152
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.58% 1.6%
Households 1.43% 1.52%
Families 1.29% 1.44%
Median Household Income   2.91%
Per Capita Income   1.73%
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.


Polk County IA - Peer Comparisons by Rank and Percentile

The table below compares Polk 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 # 1 100th
Population Density1 # 1 100th
Diversity Index2 # 7 94th
Median Household Income # 4 97th
Per Capita Income # 4 97th

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