Washington County, Iowa Population 2024

22,725

Washington County, Iowa's estimated 2024 population is 22,725 with a growth rate of 0.34% in the past year according to the most recent United States census data. Washington County, Iowa is the 27th largest county in Iowa. The 2010 population was 21,687 and has seen a growth of 4.79% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202923,110770.33%
202823,033770.34%
202722,956770.34%
202622,879770.34%
202522,802770.34%
202422,725770.34%
202322,648770.34%
202222,571770.34%
202122,494-46-0.2%
202022,5405102.32%
201922,030-65-0.29%
201822,095-141-0.63%
201722,236890.4%
201622,147-13-0.06%
201522,1601200.54%
201422,040860.39%
201321,954440.2%
201221,910850.39%
201121,8251380.64%
201021,687
199019,612-529-2.63%
198020,1411,1746.19%
197018,967-439-2.26%
196019,406-151-0.77%
195019,557-498-2.48%
194020,0552331.18%
193019,822-599-2.93%
192020,4214962.49%
191019,925-793-3.83%
190020,7182,25012.18%
189018,468-1,906-9.36%
188020,3741,4227.5%
187018,9524,71733.14%
186014,2359,278187.17%
18504,9573,363210.98%
18401,594-21,516-93.1%
showing: 36 rows
2024 Growth Rate
0.34% (77)
County Website
Washington County
State
Iowa
County Seat
2010 Population
21,687
Area
569 mi²
Density
40 people/mi²
Growth Since 2010
4.79% (1,038)
Founded
1838

Washington County, Iowa Population 2024

Population by Race

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Race
Population
Percentage (of total)
White20,69391.83%
Other race8613.82%
Two or more races7883.5%
Black or African American910.4%
Asian910.4%
Native Hawaiian or Pacific Islander100.04%
Native American
showing: 7 rows

White

Other race

Two or more races

Black or African American

Asian

Native Hawaiian or Pacific Islander

Native American

Washington County, Iowa Population by Race

Washington County, Iowa Population Pyramid 2024

Washington County, Iowa Median Age

40.1

Total

39.9

Male

40.4

Female

Washington County, Iowa Adults

There are 16,994 adults, (4,417 of whom are seniors) in Washington County, Iowa.

Washington County, Iowa Age Dependency

79.2

Age Dependency Ratio

35.1

Old Age Dependency Ratio

44

Child Dependency Ratio

Washington County, Iowa Sex Ratio

Female11,41350.65%
Male11,12149.35%

Washington County, Iowa Population by Age

Washington County, Iowa Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All8,9222.4871.628.4
Married4,9313.0485.114.9
Non Family2,7911.1853.146.9
Female7683.2963.336.7
Male4323.0351.648.4
showing: 5 rows

2.97

Average Family Size

2.48

Average Household Size

71.6%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Washington County, Iowa Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

Washington County, Iowa Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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

The highest rate of bachelors degrees is among asian people with a rate of 33.77%.

Washington County, Iowa Educational Attainment by Race

All

Male

Female

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$44,012

Average Earnings

$48,573

Average Male

$37,111

Average Female

Washington County, Iowa Earnings by Educational Attainment

Washington County, Iowa Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Washington County, Iowa Language

92.47% of Washington County, Iowa residents speak only English, while 7.53% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.77% of the population.

Washington County, Iowa Language

Washington County, Iowa Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White19,7711,4087.12%
Hispanic1,57818711.85%
Other8618710.1%
Multiple7848610.97%
Asian9133.3%
showing: 5 rows

7.49%

Overall Poverty Rate

6.74%

Male Poverty Rate

8.23%

Female Poverty Rate

Poverty in Washington County, Iowa

The race most likely to be in poverty in Washington County, Iowa is Hispanic, with 11.85% below the poverty level.

The race least likely to be in poverty in Washington County, Iowa is Asian, with 3.3% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.32%. Among those working part-time, it was 9.9%, and for those that did not work, the poverty rate was 13.88%.

Washington County, Iowa Poverty

rate

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Rate
Poverty
Less Than 9th Grade16.77%
Some College6.56%
High School6.54%
Bachelors or Greater4.61%
showing: 4 rows

Washington County, Iowa Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed34.15%
Male Unemployed18.24%
Male Employed3.65%
Female Employed3.59%
showing: 4 rows

Washington County, Iowa Poverty Rate by Employment Status and Sex

Washington County, Iowa Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Washington County, Iowa Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

57.5%

Overall Marriage Rate

59.6%

Male Marriage Rate

55.5%

Female Marriage Rate

Washington County, Iowa Married by Age and Sex

male

female

Washington County, Iowa Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

Washington County, Iowa Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Washington County, Iowa Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,249

Number of Veterans

1,110

Male Veterans

139

Female Veterans

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Washington County, Iowa Veterans by War

count

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Washington County, Iowa Veterans by Age

count

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Washington County, Iowa Veterans by Race

Washington County, Iowa Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

5.45%

Veteran Poverty Rate

28.94%

Veteran Disability Rate

Washington County, Iowa Veterans by Education

LaborForceParticipation

67.8%

Labor Force Participation

66%

Employment Rate

2.6%

Unemployment Rate

Washington County, Iowa Employment by Age

LaborForceParticipation

Washington County, Iowa Employment by Race

LaborForceParticipation

Washington 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

79.08%

Born in Washington County, Iowa

96.26%

Native Born

3.74%

Foreign Born

2.17%

Non Citizen

1.57%

Naturalized

Place of Birth

96.26% of Washington County, Iowa residents were born in the United States, with 79.08% having been born in Iowa. 2.17% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Washington County, Iowa Place of Birth

Sources