Population density (sq mi)7875791
Median age50.538.037.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)74%60%55%
Families w/ Kids under 1825%44%43%
Speak English98%92%79%
Speak Spanish1%4%13%

Key findings

  • The population density in Plymouth is 1281% higher than Iowa
  • The median age in Plymouth is 33% higher than Iowa
  • In Plymouth 98.26% of the population is White
  • In Plymouth 0.29% of the population is Black
  • In Plymouth 0.87% of the population is Asian

Compare Plymouth, IA Demographics


      Plymouth population breakdown by race

      American Indian0.00%0.32%0.82%
      Native Hawaiian0.00%0.08%0.18%
      Mixed race0.58%1.97%3.06%
      Other race0.00%1.27%4.75%
      In Plymouth, 2.0% of people are of Hispanic or Latino origin.
      Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

      Household income distribution

      Place of birth by citizenship

      Plymouth age breakdown

      Marital status

      Age of children in married couples

      Source: The Plymouth, IA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).