Last official estimated population of King William County was 15,977 (year 2014)[1]. This was 0.005% of total US population and 0.2% of total Virginia state population. Area of King William County is 285.6 mi² (=739.8 km²), in this year population density was 55.94 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), King William County population in 2026 would be 16,104 [0].
Historical population of King William 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] +1.09 %/yr
[1800-1810] +0.25 %/yr
[1810-1820] +0.44 %/yr
[1820-1830] +0.12 %/yr
[1830-1840] -0.58 %/yr
[1840-1850] -0.53 %/yr
[1850-1860] -0.29 %/yr
[1860-1870] -1.26 %/yr
[1870-1880] +1.53 %/yr
[1880-1890] +0.94 %/yr
[1890-1900] -1.36 %/yr
[1900-1910] +0.2 %/yr
[1910-1920] +0.22 %/yr
[1920-1930] -0.97 %/yr
[1930-1940] -0.09 %/yr
[1940-1950] -0.34 %/yr
[1950-1960] -0.03 %/yr
[1960-1970] -0.09 %/yr
[1970-1980] +2.22 %/yr
[1980-1990] +1.58 %/yr
[1990-2000] +1.89 %/yr
[2000-2005] +1.65 %/yr
[2005-2010] +2.22 %/yr
[2010-2014] +0.07 %/yr
Looking for settlements in King William County? Visit this page: Settlements in King William County, VA
Population of King William County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 485 | 498 | 983 |
| 5 to 9 | 545 | 538 | 1,083 |
| 10 to 14 | 576 | 532 | 1,108 |
| 15 to 19 | 489 | 482 | 971 |
| 20 to 24 | 471 | 436 | 907 |
| 25 to 29 | 475 | 500 | 975 |
| 30 to 34 | 527 | 538 | 1,065 |
| 35 to 39 | 471 | 506 | 977 |
| 40 to 44 | 515 | 565 | 1,080 |
| 45 to 49 | 582 | 590 | 1,172 |
| 50 to 54 | 630 | 684 | 1,314 |
| 55 to 59 | 579 | 636 | 1,215 |
| 60 to 64 | 463 | 541 | 1,004 |
| 65 to 69 | 418 | 445 | 863 |
| 70 to 74 | 287 | 305 | 592 |
| 75 to 79 | 177 | 212 | 389 |
| 80 to 84 | 120 | 126 | 246 |
| 85+ | 66 | 176 | 242 |
King William 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 | 7664 | 8110 | 15,774 |
| WAC | 6364 | 6578 | 12,942 |
| WA | 6204 | 6409 | 12,613 |
| NHWAC | 6187 | 6407 | 12,594 |
| NHWA | 6046 | 6253 | 12,299 |
| BAC | 1401 | 1627 | 3,028 |
| NHBAC | 1372 | 1600 | 2,972 |
| BA | 1306 | 1521 | 2,827 |
| NHBA | 1285 | 1501 | 2,786 |
| H | 212 | 200 | 412 |
| TOM | 177 | 196 | 373 |
| IAC | 193 | 176 | 369 |
| HWAC | 177 | 171 | 348 |
| NHTOM | 157 | 181 | 338 |
| NHIAC | 172 | 163 | 335 |
| HWA | 158 | 156 | 314 |
| IA | 124 | 99 | 223 |
| AAC | 97 | 112 | 209 |
| NHIA | 112 | 91 | 203 |
| NHAAC | 91 | 109 | 200 |
| AA | 65 | 81 | 146 |
| NHAA | 64 | 81 | 145 |
| HBAC | 29 | 27 | 56 |
| HBA | 21 | 20 | 41 |
| HTOM | 20 | 15 | 35 |
| HIAC | 21 | 13 | 34 |
| NAC | 10 | 21 | 31 |
| NHNAC | 10 | 19 | 29 |
| HIA | 12 | 8 | 20 |
| HAAC | 6 | 3 | 9 |
| NA | 0 | 4 | 4 |
| NHNA | 0 | 3 | 3 |
| HNAC | 0 | 2 | 2 |
| HAA | 1 | 0 | 1 |
| HNA | 0 | 1 | 1 |
• Henrico County population
21.9 mi, 
211°
• Richmond city
24.4 mi, 
239°
• Hanover County
22.1 mi, 
279°
• Caroline County
26.4 mi, 
327°
• Hopewell city
31 mi, 
201°
• New Kent County
15.4 mi, 
157°
• Essex County
17.9 mi, 
27°
• Richmond County
25.5 mi, 
50°
• Charles City County
24.1 mi, 
175°
• King and Queen County
10.3 mi, 
87°
[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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