Plymouth County IA Information


Plymouth County Subdivisions

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


Total Population 25,777
Population in Households 25,459
Population in Familes 21,246
Population in Group Qrtrs 318
Population Density2 30
Diversity Index3 20


Median Household Income $62,029
Average Household Income $81,104
Per Capita Income $32,433


Total Housing Units 10,990 (100%)
Owner Occupied HU 7,849 (71.4%)
Renter Occupied HU 2,401 (21.8%)
Vacant Housing Units 740 ( 6.7%)
Median Home Value $157,193
Average Home Value $189,862


Total Households 10,250
Average Household Size 2.48
Family Households 7,135
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 0.38% 0.51%
Households 0.45% 0.55%
Families 0.31% 0.46%
Median Household Income   2.74%
Per Capita Income   2.93%


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, 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 # 25 76th
Population Density # 44 58th
Diversity Index # 33 69th
Median Household Income # 8 93rd
Per Capita Income # 11 90th

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