Last official estimated population of Washington County was 204,019 (year 2014)[1]. This was 0.064% of total US population and 6.9% of total Arkansas state population. Area of Washington County is 952.4 mi² (=2466.7 km²), in this year population density was 214.21 p/mi². If population growth rate would be same as in period 2010-2014 (+0.12%/yr), Washington County population in 2026 would be 206,908 [0].
Historical population of Washington County for period 1830-2014 [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
[1830-1840] +12.6 %/yr
[1840-1850] +3.38 %/yr
[1850-1860] +3.94 %/yr
[1860-1870] +1.64 %/yr
[1870-1880] +3.28 %/yr
[1880-1890] +2.99 %/yr
[1890-1900] +0.68 %/yr
[1900-1910] -0.11 %/yr
[1910-1920] +0.46 %/yr
[1920-1930] +1.02 %/yr
[1930-1940] +0.46 %/yr
[1940-1950] +1.97 %/yr
[1950-1960] +1.11 %/yr
[1960-1970] +3.32 %/yr
[1970-1980] +2.65 %/yr
[1980-1990] +1.22 %/yr
[1990-2000] +3.36 %/yr
[2000-2005] +3.1 %/yr
[2005-2010] +2.01 %/yr
[2010-2014] +0.12 %/yr
Looking for settlements in Washington County? Visit this page: Settlements in Washington County, AR
Population of Washington County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 8313 | 8030 | 16,343 |
| 5 to 9 | 8131 | 7635 | 15,766 |
| 10 to 14 | 7764 | 7403 | 15,167 |
| 15 to 19 | 8770 | 8659 | 17,429 |
| 20 to 24 | 12564 | 11219 | 23,783 |
| 25 to 29 | 8649 | 8458 | 17,107 |
| 30 to 34 | 8708 | 7995 | 16,703 |
| 35 to 39 | 7571 | 7337 | 14,908 |
| 40 to 44 | 6742 | 6602 | 13,344 |
| 45 to 49 | 6175 | 5952 | 12,127 |
| 50 to 54 | 6455 | 6508 | 12,963 |
| 55 to 59 | 5621 | 5878 | 11,499 |
| 60 to 64 | 4818 | 5174 | 9,992 |
| 65 to 69 | 3779 | 4286 | 8,065 |
| 70 to 74 | 2604 | 3250 | 5,854 |
| 75 to 79 | 1730 | 2206 | 3,936 |
| 80 to 84 | 1182 | 1718 | 2,900 |
| 85+ | 964 | 1942 | 2,906 |
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 |
| WAC | 98922 | 99314 | 198,236 |
| WA | 96273 | 96476 | 192,749 |
| NH | 91798 | 93154 | 184,952 |
| NHWAC | 81153 | 83111 | 164,264 |
| NHWA | 78810 | 80576 | 159,386 |
| H | 18742 | 17098 | 35,840 |
| HWAC | 17769 | 16203 | 33,972 |
| HWA | 17463 | 15900 | 33,363 |
| BAC | 5019 | 4474 | 9,493 |
| NHBAC | 4617 | 4132 | 8,749 |
| BA | 4147 | 3513 | 7,660 |
| NHBA | 3824 | 3257 | 7,081 |
| AAC | 3483 | 3583 | 7,066 |
| NHAAC | 3284 | 3437 | 6,721 |
| IAC | 3134 | 3241 | 6,375 |
| NAC | 2945 | 2831 | 5,776 |
| AA | 2858 | 2879 | 5,737 |
| TOM | 2761 | 2976 | 5,737 |
| NHNAC | 2857 | 2753 | 5,610 |
| NA | 2835 | 2715 | 5,550 |
| NHAA | 2738 | 2801 | 5,539 |
| NHNA | 2775 | 2658 | 5,433 |
| NHTOM | 2432 | 2644 | 5,076 |
| NHIAC | 2462 | 2538 | 5,000 |
| IA | 1666 | 1693 | 3,359 |
| NHIA | 1219 | 1218 | 2,437 |
| HIAC | 672 | 703 | 1,375 |
| HIA | 447 | 475 | 922 |
| HBAC | 402 | 342 | 744 |
| HTOM | 329 | 332 | 661 |
| HBA | 323 | 256 | 579 |
| HAAC | 199 | 146 | 345 |
| HAA | 120 | 78 | 198 |
| HNAC | 88 | 78 | 166 |
| HNA | 60 | 57 | 117 |
• Benton County population
25.4 mi, 
355°
• Crawford County
26.8 mi, 
182°
• Cherokee County
43.8 mi, 
263°
• Sequoyah County
44 mi, 
222°
• Delaware County
44 mi, 
311°
• Carroll County
45.5 mi, 
56°
• McDonald County
46.1 mi, 
351°
• Adair County
24.7 mi, 258°
• Franklin County
37 mi, 
149°
• Madison County
27.8 mi, 
84°
[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
*Lawrence Arkansas Notes
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