Washington County Population 2017

Washington County's estimated population is 22,281 with a growth rate of 0.13% in the past year according to the most recent United States census data. Washington County is the 27th largest county in Iowa.

Year Population Growth Growth Rate
201622,281300.13%
201522,2511540.70%
201422,097800.36%
201322,017890.41%
201221,928910.42%
201121,8371410.65%
201021,6962,08410.63%
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%

Washington County Population Growth

Population Data via

Washington County Race Data

Race Population Percentage
White21,59296.91%
Two or More Races2631.18%
Black or African American2040.92%
Asian1110.50%
American Indian and Alaska Native650.29%
Native Hawaiian and Other Pacific Islander160.07%

Washington County Population Pyramid

0k0k0k1k1kWashington County Male Population0k0k0k1k1kWashington County Female Population

Population of Cities in Washington County

City 2010 Census 2016 Estimated Growth Growth Rate
Washington727074241542.12%
Kalona237125341636.87%
Wellman14111424130.92%
Riverside9931039464.63%
Brighton65565940.61%
Ainsworth567584173.00%
Crawfordsville26427062.27%
West Chester14614821.37%
Data Sources
  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