Washington County, Iowa Population 2024

22,578
05K10K15K20K1840186018801900192019401960198020002020YearPopulation

Washington County, Iowa's estimated 2024 population is 22,578 with a growth rate of 0.08% 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 4.11% since that time.

Note: data after 2022 is projected based on recent change
Year
Population
Growth
Change
202922,668180.08%
202822,650180.08%
202722,632180.08%
202622,614180.08%
202522,596180.08%
202422,578180.08%
202322,560180.08%
202222,542200.09%
202122,522-20-0.09%
202022,5425122.32%
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%
201021,68700%
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%
18401,594-21,074-92.97%
2024 Growth Rate
0.08% (18)
County Website
Washington County
State
Iowa
County Seat
Washington
2020 Population
22,542
Area
569 mi²
Density
40 people/mi²
Growth Since 2020
0.16% (36)
Founded
1838

Population by Race

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 American00%
91.83%Race

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

010203040506070801K900800700600500400300200100001002003004005006007008009001KMaleFemale

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

2.97

Average Family Size

2.48

Average Household Size

71.6%

Rate of Home Ownership

55.27%8.61%31.28%Households by Type

Married

Male

Female

NonFamily

MarriedAllFemaleNon FamilyMale00.10.20.30.40.50.60.70.80.91

owner

renter

Washington County, Iowa Households and Families

Less Than 9th Grade9th to 12th GradeHigh School GraduateSome CollegeAssociates DegreeBachelors DegreeGraduate Degree05001K1.5K2K2.5K3K

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade6564.29%
Associates Degree1,5249.95%
Bachelors Degree2,48316.22%
Graduate Degree1,2528.18%
High School Graduate5,55336.27%
Less Than 9th Grade5203.4%
Some College3,32121.69%
36.27%21.69%9.95%16.22%8.18%Over 25 Education

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

BlackWhite2+ RacesIslanderHispanicOther RaceAsian0%20%40%60%80%100%

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White14,12113,2973,487
Hispanic724439128
2+ Races406368112
Other Race37120673
Black80800
Asian773926
Islander760

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

OverallLess Than 9th GradeHigh School GraduateSome CollegeBachelors DegreeGraduate Degree$0$20,000$40,000$60,000$80,000

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$60,030$66,480$49,413
Graduate Degree$61,000$75,114$59,727
High School Graduate$35,337$43,113$25,000
Less Than 9th Grade$33,958$42,843$24,271
Overall$44,012$48,573$37,111
Some College$44,502$53,008$34,586

$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

92.47%Languages

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

HispanicMultipleOtherWhiteAsian0%1%2%3%4%5%6%7%8%9%10%11%12%

rate

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

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

Less Than 9th GradeHigh SchoolSome CollegeBachelors or Greater0%2%4%6%8%10%12%14%16%18%

rate

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

Washington County, Iowa Poverty Rate by Education

Male EmployedMale UnemployedFemale EmployedFemale Unemployed0%5%10%15%20%25%30%35%

rate

Rate
Poverty
Female Unemployed34.15%
Male Unemployed18.24%
Male Employed3.65%
Female Employed3.59%

Washington County, Iowa Poverty Rate by Employment Status and Sex

Washington County, Iowa Income by Household Type

Under10k10kTo15k15kTo25k25kTo35k35kTo50k50kTo75k75kTo100k100kTo150k150kTo200kOver200k05101520253035

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$86,333$101,502
Households$71,122$87,585
Married Families$98,327$-999,999,999
Non Families$39,302$51,793
HouseholdsFamiliesMarried FamiliesNon Families020,00040,00060,00080,000100,000

mean

median

Income by Household Type

Washington County, Iowa Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

55-6435-4445-5420-34Over 6501020304050607080

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

BlackOtherRaceAsianWhiteNonHispanicWhiteHispanicTwoOrMoreRacesHawaiian0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

NeverMarried

Washington County, Iowa Marital Status

25.82%27.71%37.13%6.31%Veterans by War

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,249

Number of Veterans

1,110

Male Veterans

139

Female Veterans

War
Veterans
Vietnam394
First Gulf War294
Second Gulf War274
Korea67
World War II32

Washington County, Iowa Veterans by War

18 to 3435 to 5455 to 6465 to 7475+050100150200250300350

count

Age Group
Veterans
75+339
65 to 74288
35 to 54277
55 to 64212
18 to 34133

Washington County, Iowa Veterans by Age

White2+ RacesHispanicBlackOther Race01002003004005006007008009001,0001,1001,200

count

Name
Veterans
% of Total
White1,1907.48%
2+ Races286.59%
Hispanic252.78%
Black2430%
Other Race71.54%

Washington County, Iowa Veterans by Race

Washington County, Iowa Veterans by Education

37.63%45.8%14.09%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

16 - 1920 - 2425 - 2930 - 3435 - 4445 - 5455 - 5960 - 6465 - 7475+0102030405060708090

LaborForceParticipation

67.8%

Labor Force Participation

66%

Employment Rate

2.6%

Unemployment Rate

Washington County, Iowa Employment by Age

IslanderAsianHispanicOther Race2+ RacesWhiteWhite Non-HispanicBlack0102030405060708090100

LaborForceParticipation

Washington County, Iowa Employment by Race

Less Than High SchoolHigh School GraduateSome CollegeBachelors or Greater0102030405060708090

LaborForceParticipation

Washington County, Iowa Employment by Education

Origin of Non-Citizens

14.11%9.41%72.39%Origin

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

8.47%18.08%68.64%Origin

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