Polk County IA Information


Polk County Subdivisions

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


Total Population 488,405
Daytime Population: Workers 296,787
Daytime Population: Residents 238,932
Total Daytime Population (TDP) 535,719
Ratio TDP/Total Population1 1.10
Population in Households 478,476
Population in Familes 374,250
Population in Group Qrtrs 9,929
Population Density2 851
Diversity Index3 43


Median Household Income $62,085
Average Household Income $82,119
Per Capita Income $32,413


Total Housing Units 203,335 (100%)
Owner Occupied HU 129,051 (63.5%)
Renter Occupied HU 62,133 (30.6%)
Vacant Housing Units 12,151 ( 6.0%)
Median Home Value $172,606
Average Home Value $200,847


Total Households 191,184
Average Household Size 2.5
Family Households 120,194
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 1.75% 1.6%
Households 1.62% 1.53%
Families 1.44% 1.43%
Median Household Income   1.4%
Per Capita Income   2.02%


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, 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 # 1 100th
Population Density # 1 100th
Diversity Index # 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.