Washington County Population 2018

Washington County's estimated population is 150,578 with a growth rate of 0.51% in the past year according to the most recent United States census data. Washington County is the 11th largest county in Maryland.

Year Population Growth Growth Rate
2017150,5787680.51%
2016149,8106120.41%
2015149,1981010.07%
2014149,097520.03%
2013149,045-12-0.01%
2012149,0573020.20%
2011148,7551,0310.70%
2010147,72426,33121.69%
1990121,3938,3077.35%
1980113,0869,2578.92%
1970103,82912,61013.82%
196091,21912,33315.63%
195078,88610,04814.60%
194068,8382,9564.49%
193065,8826,18810.37%
192059,69410,07720.31%
191049,6174,4849.94%
190045,1335,35113.45%
189039,7821,2213.17%
188038,5613,84911.09%
187034,7123,29510.49%
186031,4175691.84%
185030,8481,9986.93%
184028,8503,58214.18%
183025,2682,1939.50%
182023,0754,34523.20%
181018,730800.43%
180018,6502,82817.87%
179015,8220.00%

Washington County Population Growth

Population Data via

Washington County Race Data

Race Population Percentage
White125,66083.45%
Black or African American16,57511.01%
Two or More Races3,9922.65%
Asian2,7211.81%
American Indian and Alaska Native4960.33%
Native Hawaiian and Other Pacific Islander1260.08%

Washington County Population Pyramid

0k1k2k3k4k5k6k Male Population0k1k2k3k4k5k6k 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