Washington County, Iowa Population 2021

Washington County, Iowa's estimated population is 21,779 with a growth rate of -0.43% in the past year according to the most recent United States census data. Washington County, Iowa is the 29th largest county inIowa. The 2010 Population was 21,688 and has seen a growth of 0.42% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
202121,779-93-0.43%
202021,872-93-0.42%
201921,965-93-0.42%
201822,058-146-0.66%
201722,204780.35%
201622,126-19-0.09%
201522,1451160.53%
201422,029850.39%
201321,944410.19%
201221,903810.37%
201121,8221340.62%
201021,6882,07610.59%
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%
188020,3741,4227.50%
187018,9524,71733.14%
186014,2359,278187.17%
18504,9573,363210.98%
18401,5940.00%
2021 Growth Rate
-0.43% (-93)
County Website
State
Founded
1838
County Seat
2010 Population
21,688
Growth Since 2010
0.42% (91)
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Washington County, Iowa Population Growth

Population by Race

Race Population Percentage
White21,04395.22%
Some Other Race3921.77%
Two or More Races2991.35%
Black or African American1720.78%
Asian1320.60%
American Indian and Alaska Native580.26%
Native Hawaiian and Other Pacific Islander40.02%
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Washington County, Iowa Population by Race

Washington County, Iowa Population Pyramid $2021

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Washington County, Iowa Median Age

40.3


Total

38.8


Male

41.6


Female

Washington County, Iowa Adults

There are 16,634 adults, (4,141 of whom are seniors) in Washington County, Iowa.

Washington County, Iowa Age Dependency

76.9

Age Dependency Ratio

33.1

Old Age Dependency Ratio

43.8

Child Dependency Ratio

Washington County, Iowa Sex Ratio

Female

11,136

50.39%

Male

10,964

49.61%

Washington County, Iowa Population by Age

Washington County, Iowa Renter vs Owner Occupied by Household Type

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Washington County, Iowa Household Types

Type Owner Renter
Female47.1%52.9%
Male53%47%
Non Family54.5%45.5%
All71%29%
Married85.2%14.8%

71.0%

Rate of Home Ownership

Washington County, Iowa Households and Families

Type Count Average Size Owned
All8,8322.4671
Married4,9542.9985.2
Non Family2,6641.1954.5
Female8333.2847.1
Male3812.7353

2.91

Average Family Size

2.46

Average Household Size

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Washington County, Iowa Households by Type

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Education Attained Count Percentage
Less Than 9th Grade6714.51%
9th to 12th Grade6044.06%
High School Graduate5,83439.25%
Some College2,88119.39%
Associates Degree1,62910.96%
Bachelors Degree2,27315.29%
Graduate Degree9706.53%
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Washington County, Iowa Educational Attainment by Sex (over 25)

Washington County, Iowa Educational Attainment by Race

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Race Total High School Bachelors
White13,97812,9823,132
Hispanic52533569
Other Race1477846
Black131101
Asian1236632
2+ Races11511319
Native American20203
Islander44

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

The highest rate of bachelors degrees is among other race people with a rate of 31.29%.

Washington County, Iowa Educational Attainment by Race

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Name Average Male Female
Overall$39,004$45,524$30,559
Less Than 9th Grade$30,298$37,698$14,818
High School Graduate$35,270$42,112$24,478
Some College$34,821$45,074$27,394
Bachelors Degree$45,929$50,833$39,680
Graduate Degree$66,168$80,350$62,667

$39,004

Average Earnings

$45,524

Average Male

$30,559

Average Female

Washington County, Iowa Earnings by Educational Attainment

Washington County, Iowa Language by Age

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Washington County, Iowa Language

91.24% of Washington County, Iowa residents speak only English, while 8.76% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.46% of the population.

Washington County, Iowa Language

Washington County, Iowa Poverty by Race

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Name Total In Poverty Poverty Rate
White19,7591,7668.94%
Hispanic1,36021816.03%
Other3927218.37%
Black1647042.68%
Multiple2765218.84%
Native583865.52%

9.86%

Overall Poverty Rate

8.61%

Male Poverty Rate

11.09%

Female Poverty Rate

Poverty in Washington County, Iowa

The race most likely to be in poverty in Washington County, Iowa is Native, with 65.52% below the poverty level.

The race least likely to be in poverty in Washington County, Iowa is White, with 8.94% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.08%. Among those working part-time, it was 12.31%, and for those that did not work, the poverty rate was 14.36%.

Washington County, Iowa Poverty

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Name Poverty
Less Than 9th Grade15.25%
Some College8.45%
High School8.17%
Bachelors or Greater3.04%

Washington County, Iowa Poverty Rate by Education

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Rate Poverty
Female Unemployed35.06%
Male Unemployed14.06%
Female Employed4.97%
Male Employed4.92%

Washington County, Iowa Poverty Rate by Employment Status and Sex

Washington County, Iowa Income by Household Type

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Name Median Mean
Households$62,556$76,076
Families$75,545$87,194
Married Families$83,854-
Non Families$34,940$44,769
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Income by Household Type

Washington County, Iowa Marital Status

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Marriage Rates

58.2%

Overall Marriage Rate

60.0%

Male Marriage Rate

56.5%

Female Marriage Rate

Washington County, Iowa Married by Age and Sex

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Washington County, Iowa Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

Washington County, Iowa Marital Status by Race

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Washington County, Iowa Marital Status

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1,451

Number of Veterans

1,328

Male Veterans

123

Female Veterans

War Veterans
Vietnam495
Second Gulf War315
First Gulf War217
Korea117
World War II72

Washington County, Iowa Veterans by War

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Age Group Veterans
65 to 74420
75+374
35 to 54252
55 to 64205
18 to 34200

Washington County, Iowa Veterans by Age

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Name Veterans % of Total
White1,4379.02%
Hispanic425.35%
2+ Races1310.92%
Black10.64%

Washington County, Iowa Veterans by Race

Washington County, Iowa Veterans by Education

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4.55%

Veteran Poverty Rate

24.08%

Veteran Disability Rate

Washington County, Iowa Veterans by Education

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67.3%

Labor Force Participation

65.2%

Employment Rate

3.1%

Unemployment Rate

Washington County, Iowa Employment by Age

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Washington County, Iowa Employment by Race

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Washington County, Iowa Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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75.95%

Born in Washington County, Iowa

95.94%

Native Born

4.06%

Foreign Born

2.21%

Non Citizen

1.85%

Naturalized

Place of Birth

95.94% of Washington County, Iowa residents were born in the United States, with 75.95% having been born in Iowa. 2.21% 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

  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