Plymouth County, Iowa Population 2024

25,722

Plymouth County, Iowa's estimated 2024 population is 25,722 with a growth rate of 0% in the past year according to the most recent United States census data. Plymouth County, Iowa is the 25th largest county in Iowa. The 2010 population was 24,978 and has seen a growth of 2.98% since that time.

Note: data after 2022 is projected based on recent change

34 Rows

Year
Population
Growth
Change
202925,72200%
202825,72200%
202725,72200%
202625,72200%
202525,72200%
202425,72200%
202325,72200%
202225,722-9-0.03%
202125,731390.15%
202025,6924921.95%
201925,2001760.7%
201825,024-29-0.12%
201725,053-154-0.61%
201625,2072951.18%
201524,912-6-0.02%
201424,918-19-0.08%
201324,9371010.41%
201224,836120.05%
201124,824-154-0.62%
201024,97800%
199023,388-1,355-5.48%
198024,7434311.77%
197024,3124061.7%
196023,9066542.81%
195023,252-250-1.06%
194023,502-657-2.72%
193024,1595752.44%
192023,5844551.97%
191023,1299204.14%
190022,2092,64113.5%
189019,56811,002128.44%
18808,5666,367289.54%
18702,1992,0511385.81%
1860148-25,574-99.42%
2024 Growth Rate
0% (0)
County Website
Plymouth County
State
Iowa
County Seat
Le Mars
2020 Population
25,692
Area
863 mi²
Density
30 people/mi²
Growth Since 2020
0.12% (30)
Founded
1851

Population by Race

Race
Population
Percentage (of total)
White23,64392.28%
Two or more races6932.7%
Other race4851.89%
Black or African American4561.78%
Asian1330.52%
Native American1140.44%
Native Hawaiian or Pacific Islander970.38%

White

Two or more races

Other race

Black or African American

Asian

Native American

Native Hawaiian or Pacific Islander

Plymouth County, Iowa Population by Race

Plymouth County, Iowa Population Pyramid 2024

Plymouth County, Iowa Median Age

40.9

Total

39.9

Male

41.9

Female

Plymouth County, Iowa Adults

There are 19,263 adults, (4,853 of whom are seniors) in Plymouth County, Iowa.

Plymouth County, Iowa Age Dependency

77.8

Age Dependency Ratio

33.7

Old Age Dependency Ratio

44.1

Child Dependency Ratio

Plymouth County, Iowa Sex Ratio

Female12,60849.21%
Male13,01350.79%

Plymouth County, Iowa Population by Age

Plymouth County, Iowa Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All10,2142.4775.324.7
Married6,0603.0889.310.7
Non Family3,0621.1254.845.2
Female6613.0350.149.9
Male4312.7463.136.9

2.99

Average Family Size

2.47

Average Household Size

75.3%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Plymouth County, Iowa Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade4952.86%
Associates Degree2,49114.4%
Bachelors Degree3,09917.91%
Graduate Degree1,0666.16%
High School Graduate6,23136.01%
Less Than 9th Grade4882.82%
Some College3,43219.84%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

Plymouth County, Iowa Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White15,93215,3263,928
Hispanic77344691
2+ Races27918946
Black2341975
Other Race23213158
Asian12912981
Native American876629
Islander27178

The highest rate of high school graduation is among asian people with a rate of 100%.

The highest rate of bachelors degrees is among asian people with a rate of 62.79%.

Plymouth County, Iowa Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$62,379$67,064$53,645
Graduate Degree$67,109$75,167$66,492
High School Graduate$42,509$50,406$29,536
Less Than 9th Grade$42,423$47,198$33,750
Overall$49,986$57,968$41,642
Some College$49,432$60,797$39,851

$49,986

Average Earnings

$57,968

Average Male

$41,642

Average Female

Plymouth County, Iowa Earnings by Educational Attainment

Plymouth County, Iowa Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Plymouth County, Iowa Language

92.41% of Plymouth County, Iowa residents speak only English, while 7.59% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.71% of the population.

Plymouth County, Iowa Language

Plymouth County, Iowa Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White22,6121,3065.78%
Hispanic1,490825.5%
Black446316.95%
Other485275.57%
Multiple693111.59%
Native11432.63%

5.67%

Overall Poverty Rate

4.97%

Male Poverty Rate

6.4%

Female Poverty Rate

Poverty in Plymouth County, Iowa

The race most likely to be in poverty in Plymouth County, Iowa is Black, with 6.95% below the poverty level.

The race least likely to be in poverty in Plymouth County, Iowa is Multiple, with 1.59% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.4%. Among those working part-time, it was 6.85%, and for those that did not work, the poverty rate was 13.23%.

Plymouth County, Iowa Poverty

rate

Rate
Poverty
Less Than 9th Grade14.21%
High School6.64%
Some College3.76%
Bachelors or Greater2.91%

Plymouth County, Iowa Poverty Rate by Education

rate

Rate
Poverty
Male Unemployed22.6%
Female Unemployed11.21%
Female Employed3.3%
Male Employed2.25%

Plymouth County, Iowa Poverty Rate by Employment Status and Sex

Plymouth County, Iowa Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$94,094$114,073
Households$79,963$98,322
Married Families$103,690$-999,999,999
Non Families$42,968$57,391

mean

median

Income by Household Type

Plymouth County, Iowa Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

61.0%

Overall Marriage Rate

61.2%

Male Marriage Rate

60.8%

Female Marriage Rate

Plymouth County, Iowa Married by Age and Sex

male

female

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

Married

Widowed

Divorced

Separated

NeverMarried

Plymouth County, Iowa Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,518

Number of Veterans

1,323

Male Veterans

195

Female Veterans

War
Veterans
Vietnam659
First Gulf War252
Second Gulf War247
Korea222
World War II25

Plymouth County, Iowa Veterans by War

count

Age Group
Veterans
75+565
65 to 74432
35 to 54222
55 to 64159
18 to 34140

Plymouth County, Iowa Veterans by Age

count

Name
Veterans
% of Total
White1,4870.08266622192572827
Native American290.3333333333333333
Other Race20.006968641114982578
Hispanic20.002224694104560623

Plymouth County, Iowa Veterans by Race

Plymouth County, Iowa Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

2.84%

Veteran Poverty Rate

29.16%

Veteran Disability Rate

Plymouth County, Iowa Veterans by Education

LaborForceParticipation

69.5%

Labor Force Participation

67.8%

Employment Rate

2.1%

Unemployment Rate

Plymouth County, Iowa Employment by Age

LaborForceParticipation

Plymouth County, Iowa Employment by Race

LaborForceParticipation

Plymouth County, Iowa Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

75.54%

Born in Plymouth County, Iowa

95.5%

Native Born

4.5%

Foreign Born

2.94%

Non Citizen

1.56%

Naturalized

Place of Birth

95.5% of Plymouth County, Iowa residents were born in the United States, with 75.54% having been born in Iowa. 2.94% 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

Sources