Plymouth County Population 2018

Plymouth County's estimated population is 25,220 with a growth rate of 0.06% in the past year according to the most recent United States census data. Plymouth County is the 25th largest county in Iowa.

Year Population Growth Growth Rate
201725,220150.06%
201625,2053071.23%
201524,89810.00%
201424,897-19-0.08%
201324,916940.38%
201224,822140.06%
201124,808-162-0.65%
201024,9701,5826.76%
199023,388-1,355-5.48%
198024,7434311.77%
197024,3124061.70%
196023,9066542.81%
195023,252-250-1.06%
194023,502-657-2.72%
193024,1595752.44%
192023,5844551.97%
191023,1299204.14%
190022,2092,64113.50%
189019,56811,002128.44%
18808,5666,367289.54%
18702,1992,0511385.81%
18601480.00%

Plymouth County Population Growth

Population Data via

Plymouth County Race Data

Race Population Percentage
White24,10495.57%
Two or More Races2771.10%
Black or African American1810.72%
Asian1700.67%
American Indian and Alaska Native1340.53%
Native Hawaiian and Other Pacific Islander470.19%

Plymouth County Population Pyramid

0k0k0k1k1k1k Male Population0k0k0k1k1k1k Female Population8580757065605550454035302520151050
Data Sources
  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990