Last official estimated population of Washington County was 123,302 (year 2014)[1]. This was 0.039% of total US population and 1.9% of total Tennessee state population. Area of Washington County is 329.8 mi² (=854.2 km²), in this year population density was 373.87 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), Washington County population in 2024 would be 124,113 [0].
Historical population of Washington County for period 1790-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1790-1800] +0.83 %/yr
[1800-1810] +1.95 %/yr
[1810-1820] +2.13 %/yr
[1820-1830] +1.41 %/yr
[1830-1840] +0.67 %/yr
[1840-1850] +1.67 %/yr
[1850-1860] +0.68 %/yr
[1860-1870] +0.96 %/yr
[1870-1880] -0.08 %/yr
[1880-1890] +2.32 %/yr
[1890-1900] +1.05 %/yr
[1900-1910] +2.51 %/yr
[1910-1920] +1.63 %/yr
[1920-1930] +3.01 %/yr
[1930-1940] +1.2 %/yr
[1940-1950] +1.51 %/yr
[1950-1960] +0.78 %/yr
[1960-1970] +1.32 %/yr
[1970-1980] +1.85 %/yr
[1980-1990] +0.4 %/yr
[1990-2000] +1.5 %/yr
[2000-2005] +1.16 %/yr
[2005-2010] +1.61 %/yr
[2010-2014] +0.07 %/yr
Looking for settlements in Washington County? Visit this page: Settlements in Washington County, TN
Population of Washington County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3369 | 3238 | 6,607 |
| 5 to 9 | 3526 | 3388 | 6,914 |
| 10 to 14 | 3590 | 3498 | 7,088 |
| 15 to 19 | 4165 | 4195 | 8,360 |
| 20 to 24 | 5573 | 5972 | 11,545 |
| 25 to 29 | 3933 | 3941 | 7,874 |
| 30 to 34 | 3743 | 3753 | 7,496 |
| 35 to 39 | 3671 | 3632 | 7,303 |
| 40 to 44 | 4147 | 4194 | 8,341 |
| 45 to 49 | 4114 | 4040 | 8,154 |
| 50 to 54 | 4325 | 4484 | 8,809 |
| 55 to 59 | 4165 | 4387 | 8,552 |
| 60 to 64 | 3809 | 3995 | 7,804 |
| 65 to 69 | 3454 | 3744 | 7,198 |
| 70 to 74 | 2582 | 2819 | 5,401 |
| 75 to 79 | 1716 | 2051 | 3,767 |
| 80 to 84 | 1079 | 1505 | 2,584 |
| 85+ | 820 | 1625 | 2,445 |
Washington County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 59600 | 62536 | 122,136 |
| WAC | 57765 | 60658 | 118,423 |
| WA | 56727 | 59574 | 116,301 |
| NHWAC | 55803 | 58927 | 114,730 |
| NHWA | 54874 | 57929 | 112,803 |
| BAC | 3468 | 3181 | 6,649 |
| NHBAC | 3297 | 3047 | 6,344 |
| BA | 2891 | 2539 | 5,430 |
| NHBA | 2781 | 2449 | 5,230 |
| H | 2181 | 1925 | 4,106 |
| HWAC | 1962 | 1731 | 3,693 |
| HWA | 1853 | 1645 | 3,498 |
| TOM | 1086 | 1140 | 2,226 |
| AAC | 1007 | 1196 | 2,203 |
| NHAAC | 971 | 1173 | 2,144 |
| NHTOM | 970 | 1047 | 2,017 |
| AA | 799 | 954 | 1,753 |
| NHAA | 781 | 944 | 1,725 |
| IAC | 614 | 562 | 1,176 |
| NHIAC | 491 | 444 | 935 |
| IA | 243 | 225 | 468 |
| NHIA | 174 | 155 | 329 |
| HBAC | 171 | 134 | 305 |
| HIAC | 123 | 118 | 241 |
| HTOM | 116 | 93 | 209 |
| HBA | 110 | 90 | 200 |
| NAC | 77 | 75 | 152 |
| HIA | 69 | 70 | 139 |
| NHNAC | 57 | 53 | 110 |
| NA | 35 | 29 | 64 |
| HAAC | 36 | 23 | 59 |
| HNAC | 20 | 22 | 42 |
| NHNA | 20 | 12 | 32 |
| HNA | 15 | 17 | 32 |
| HAA | 18 | 10 | 28 |
• Sullivan County population
18.4 mi, 
36°
• Greene County
21.2 mi, 
247°
• Carter County
20.5 mi, 
92°
• Hawkins County
26.6 mi, 
294°
• Scott County
29.6 mi, 
347°
• Madison County
32.2 mi, 
202°
• Unicoi County
14.2 mi, 
162°
• Bristol city
29.1 mi, 40°
• Yancey County
30 mi, 159°
• Mitchell County
26.9 mi, 
136°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
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