Plymouth County IA Information


Plymouth County Subdivisions

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


Total Population 25,299
Daytime Population: Workers 12,121
Daytime Population: Residents 11,573
Total Daytime Population (TDP) 23,694
Ratio TDP/Total Population1 0.94
Population in Households 24,981
Population in Familes 20,988
Population in Group Qrtrs 318
Population Density2 29
Diversity Index3 18


Median Household Income $59,375
Average Household Income $76,590
Per Capita Income $30,736


Total Housing Units 10,915 (100%)
Owner Occupied HU 7,817 (71.6%)
Renter Occupied HU 2,274 (20.8%)
Vacant Housing Units 824 ( 7.5%)
Median Home Value $149,388
Average Home Value $183,827


Total Households 10,091
Average Household Size 2.48
Family Households 7,034
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 0.17% 0.27%
Households 0.3% 0.35%
Families 0.16% 0.26%
Median Household Income   2.13%
Per Capita Income   2.74%


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, 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 # 26 75th
Population Density # 46 56th
Diversity Index # 40 61st
Median Household Income # 9 92nd
Per Capita Income # 10 91st

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