Washington County Population 2018
Washington County's estimated population is 54,387 with a growth rate of 0.28% in the past year according to the most recent United States census data. Washington County is the 34th largest county in Virginia.
| Year | Population | Growth | Growth Rate |
| 2017 | 54,387 | 150 | 0.28% |
| 2016 | 54,237 | -71 | -0.13% |
| 2015 | 54,308 | -273 | -0.50% |
| 2014 | 54,581 | -193 | -0.35% |
| 2013 | 54,774 | -322 | -0.58% |
| 2012 | 55,096 | 294 | 0.54% |
| 2011 | 54,802 | -159 | -0.29% |
| 2010 | 54,961 | 9,074 | 19.77% |
| 1990 | 45,887 | -600 | -1.29% |
| 1980 | 46,487 | 5,652 | 13.84% |
| 1970 | 40,835 | 2,759 | 7.25% |
| 1960 | 38,076 | 540 | 1.44% |
| 1950 | 37,536 | -661 | -1.73% |
| 1940 | 38,197 | 4,347 | 12.84% |
| 1930 | 33,850 | 1,474 | 4.55% |
| 1920 | 32,376 | -454 | -1.38% |
| 1910 | 32,830 | 3,835 | 13.23% |
| 1900 | 28,995 | -25 | -0.09% |
| 1890 | 29,020 | 3,817 | 15.15% |
| 1880 | 25,203 | 8,387 | 49.88% |
| 1870 | 16,816 | -76 | -0.45% |
| 1860 | 16,892 | 2,280 | 15.60% |
| 1850 | 14,612 | 1,611 | 12.39% |
| 1840 | 13,001 | -2,613 | -16.73% |
| 1830 | 15,614 | 3,170 | 25.47% |
| 1820 | 12,444 | 288 | 2.37% |
| 1810 | 12,156 | 2,620 | 27.47% |
| 1800 | 9,536 | 3,911 | 69.53% |
| 1790 | 5,625 | 0.00% |