Washington County Population 2018

Washington County's estimated population is 588,957 with a growth rate of 1.07% in the past year according to the most recent United States census data. Washington County is the 2nd largest county in Oregon.

Year Population Growth Growth Rate
2017588,9576,2181.07%
2016582,73910,3251.80%
2015572,41410,7641.92%
2014561,6507,0531.27%
2013554,5977,2991.33%
2012547,2987,7801.44%
2011539,5187,9651.50%
2010531,553219,99970.61%
1990311,55465,74626.75%
1980245,80887,88855.65%
1970157,92065,68371.21%
196092,23730,96850.54%
195061,26922,07556.32%
194039,1948,91929.46%
193030,2753,89914.78%
192026,3764,85422.55%
191021,5227,05548.77%
190014,4672,49520.84%
189011,9724,89069.05%
18807,0822,82166.21%
18704,2611,46052.12%
18602,8011495.62%
18502,6520.00%

Washington County Population Growth

Population Data via

Washington County Race Data

Race Population Percentage
White469,00579.63%
Asian58,0099.85%
Two or More Races23,8474.05%
Black or African American12,5742.13%
American Indian and Alaska Native6,3021.07%
Native Hawaiian and Other Pacific Islander3,0220.51%

Washington County Population Pyramid

0k5k10k15k20k Male Population0k5k10k15k20k Female Population8580757065605550454035302520151050
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