Plymouth County, Iowa Population 2021

Plymouth County, Iowa's estimated population is 25,483 with a growth rate of 0.60% in the past year according to the most recent United States census data. Plymouth County, Iowa is the 26th largest county inIowa. The 2010 Population was 24,975 and has seen a growth of 2.03% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
202125,4831530.60%
202025,3301530.61%
201925,1771530.61%
201825,024-36-0.14%
201725,060-120-0.48%
201625,1802811.13%
201524,899-12-0.05%
201424,911-20-0.08%
201324,9311010.41%
201224,830120.05%
201124,818-157-0.63%
201024,9751,5876.79%
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%
2021 Growth Rate
0.60% (153)
County Website
State
Founded
1851
County Seat
2010 Population
24,975
Growth Since 2010
2.03% (508)
map placeholder

Plymouth County, Iowa Population Growth

Population by Race

Race Population Percentage
White23,69494.52%
Some Other Race5822.32%
Two or More Races2681.07%
Black or African American2440.97%
Asian1630.65%
American Indian and Alaska Native1170.47%
Loading...

Plymouth County, Iowa Population by Race

Plymouth County, Iowa Population Pyramid $2021

Loading...

Plymouth County, Iowa Median Age

40


Total

39.2


Male

41.6


Female

Plymouth County, Iowa Adults

There are 18,810 adults, (4,531 of whom are seniors) in Plymouth County, Iowa.

Plymouth County, Iowa Age Dependency

75.6

Age Dependency Ratio

31.7

Old Age Dependency Ratio

43.8

Child Dependency Ratio

Plymouth County, Iowa Sex Ratio

Female

12,772

50.95%

Male

12,296

49.05%

Plymouth County, Iowa Population by Age

Plymouth County, Iowa Renter vs Owner Occupied by Household Type

map placeholder

Plymouth County, Iowa Household Types

Type Owner Renter
Female48.5%51.5%
Non Family59.8%40.2%
Male66.8%33.2%
All77.5%22.5%
Married91.7%8.3%

77.5%

Rate of Home Ownership

Plymouth County, Iowa Households and Families

Type Count Average Size Owned
All10,2502.4177.5
Married5,9092.9491.7
Non Family2,9501.1559.8
Female9212.7748.5
Male4703.0666.8

2.84

Average Family Size

2.41

Average Household Size

Loading...

Plymouth County, Iowa Households by Type

Loading...
Education Attained Count Percentage
Less Than 9th Grade5593.32%
9th to 12th Grade6003.57%
High School Graduate5,69633.86%
Some College3,94623.46%
Associates Degree2,12012.60%
Bachelors Degree2,97517.69%
Graduate Degree9245.49%
Loading...

Plymouth County, Iowa Educational Attainment by Sex (over 25)

Plymouth County, Iowa Educational Attainment by Race

Loading...
Race Total High School Bachelors
White15,88015,0563,853
Hispanic55222923
Other Race26988
Black1461465
Asian12411723
Native American8378
2+ Races60576

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among white people with a rate of 24.26%.

Plymouth County, Iowa Educational Attainment by Race

Loading...
Name Average Male Female
Overall$44,889$51,761$36,386
Less Than 9th Grade$30,167$32,250$
High School Graduate$41,753$49,005$28,164
Some College$43,307$52,076$36,076
Bachelors Degree$54,042$67,076$47,422
Graduate Degree$61,029$72,917$58,393

$44,889

Average Earnings

$51,761

Average Male

$36,386

Average Female

Plymouth County, Iowa Earnings by Educational Attainment

Plymouth County, Iowa Language by Age

Loading...

Plymouth County, Iowa Language

94.59% of Plymouth County, Iowa residents speak only English, while 5.41% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.17% of the population.

Plymouth County, Iowa Language

Plymouth County, Iowa Poverty by Race

Loading...
Name Total In Poverty Poverty Rate
White22,6371,6287.19%
Hispanic1,31143433.10%
Other58225844.33%
Multiple2687427.61%
Native1175244.44%
Asian1633420.86%
Black242249.92%

9.08%

Overall Poverty Rate

8.18%

Male Poverty Rate

9.94%

Female Poverty Rate

Poverty in Plymouth County, Iowa

The race most likely to be in poverty in Plymouth County, Iowa is Native, with 44.44% below the poverty level.

The race least likely to be in poverty in Plymouth County, Iowa is White, with 7.19% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.49%. Among those working part-time, it was 12.01%, and for those that did not work, the poverty rate was 13.10%.

Plymouth County, Iowa Poverty

Loading...
Name Poverty
Less Than 9th Grade23.23%
High School6.39%
Some College5.51%
Bachelors or Greater2.11%

Plymouth County, Iowa Poverty Rate by Education

Loading...
Rate Poverty
Female Unemployed27.50%
Male Unemployed19.83%
Female Employed6.96%
Male Employed4.56%

Plymouth County, Iowa Poverty Rate by Employment Status and Sex

Plymouth County, Iowa Income by Household Type

Loading...
Name Median Mean
Households$67,297$83,138
Families$80,779$96,868
Married Families$89,647-
Non Families$36,292$43,712
Loading...

Income by Household Type

Plymouth County, Iowa Marital Status

map placeholder

Marriage Rates

61.0%

Overall Marriage Rate

62.0%

Male Marriage Rate

60.0%

Female Marriage Rate

Plymouth County, Iowa Married by Age and Sex

Loading...

Plymouth County, Iowa Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.

Plymouth County, Iowa Marital Status by Race

map placeholder

Plymouth County, Iowa Marital Status

Loading...

1,691

Number of Veterans

1,455

Male Veterans

236

Female Veterans

War Veterans
Vietnam630
Second Gulf War365
First Gulf War265
Korea234
World War II60

Plymouth County, Iowa Veterans by War

Loading...
Age Group Veterans
75+489
65 to 74464
35 to 54320
55 to 64240
18 to 34178

Plymouth County, Iowa Veterans by Age

Loading...
Name Veterans % of Total
White1,6889.40%
Hispanic101.32%
Native American33.61%

Plymouth County, Iowa Veterans by Race

Plymouth County, Iowa Veterans by Education

Loading...

2.82%

Veteran Poverty Rate

23.06%

Veteran Disability Rate

Plymouth County, Iowa Veterans by Education

Loading...

69.5%

Labor Force Participation

68.2%

Employment Rate

1.8%

Unemployment Rate

Plymouth County, Iowa Employment by Age

Loading...

Plymouth County, Iowa Employment by Race

Loading...

Plymouth County, Iowa Employment by Education

Origin of Non-Citizens

Loading...

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Loading...

75.44%

Born in Plymouth County, Iowa

96.89%

Native Born

3.11%

Foreign Born

1.98%

Non Citizen

1.13%

Naturalized

Place of Birth

96.89% of Plymouth County, Iowa residents were born in the United States, with 75.44% having been born in Iowa. 1.98% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Plymouth County, Iowa Place of Birth

  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

Sources