Plymouth County IA Information


Plymouth County Subdivisions

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


Total Population 25,399
Population in Households 25,088
Population in Familes 21,122
Population in Group Qrtrs 311
Population Density1 29
Diversity Index2 18


Total Households 10,231
Average Household Size 2.45
Family Households 7,158
Average Family Size 3


Total Housing Units 10,978 (100%)
Owner Occupied HU 7,910 (72.1%)
Renter Occupied HU 2,321 (21.1%)
Vacant Housing Units 747 ( 6.8%)
Median Home Value $146,812
Average Home Value $183,274


Median Household Income $60,071
Average Household Income $76,579
Per Capita Income $31,028
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.26% 0.33%
Households 0.57% 0.51%
Families 0.47% 0.45%
Median Household Income   2.67%
Per Capita Income   2.07%
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.


Plymouth County IA - Peer Comparisons by Rank and Percentile

The table below compares Plymouth 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 # 26 75th
Population Density1 # 46 55th
Diversity Index2 # 36 65th
Median Household Income # 5 96th
Per Capita Income # 8 93rd

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