Last official estimated population of Westmoreland County was 17,444 (year 2014)[1]. This was 0.005% of total US population and 0.2% of total Virginia state population. Area of Westmoreland County is 253.0 mi² (=655.2 km²), in this year population density was 68.96 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Westmoreland County population in 2026 would be 17,414 [0].
Historical population of Westmoreland 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

[1790-1810] +0.24 %/yr
[1810-1820] -1.59 %/yr
[1820-1830] +1.98 %/yr
[1830-1840] -0.46 %/yr
[1840-1850] +0.08 %/yr
[1850-1860] +0.25 %/yr
[1860-1870] -0.75 %/yr
[1870-1880] +1.42 %/yr
[1880-1890] -0.52 %/yr
[1890-1900] +0.96 %/yr
[1900-1910] +0.08 %/yr
[1910-1920] +0.95 %/yr
[1920-1930] -1.85 %/yr
[1930-1940] +1.13 %/yr
[1940-1950] +0.65 %/yr
[1950-1960] +0.85 %/yr
[1960-1970] +0.95 %/yr
[1970-1980] +1.46 %/yr
[1980-1990] +0.98 %/yr
[1990-2000] +0.75 %/yr
[2000-2005] +0.09 %/yr
[2005-2010] +0.82 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Westmoreland County? Visit this page: Settlements in Westmoreland County, VA
Population of Westmoreland County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 476 | 466 | 942 |
| 5 to 9 | 468 | 383 | 851 |
| 10 to 14 | 438 | 450 | 888 |
| 15 to 19 | 463 | 437 | 900 |
| 20 to 24 | 494 | 469 | 963 |
| 25 to 29 | 501 | 486 | 987 |
| 30 to 34 | 464 | 428 | 892 |
| 35 to 39 | 376 | 401 | 777 |
| 40 to 44 | 437 | 443 | 880 |
| 45 to 49 | 470 | 526 | 996 |
| 50 to 54 | 620 | 737 | 1,357 |
| 55 to 59 | 714 | 752 | 1,466 |
| 60 to 64 | 679 | 755 | 1,434 |
| 65 to 69 | 607 | 725 | 1,332 |
| 70 to 74 | 536 | 570 | 1,106 |
| 75 to 79 | 353 | 442 | 795 |
| 80 to 84 | 254 | 256 | 510 |
| 85+ | 144 | 257 | 401 |
Westmoreland 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 | 7831 | 8576 | 16,407 |
| WAC | 6104 | 6265 | 12,369 |
| WA | 5892 | 6088 | 11,980 |
| NHWAC | 5539 | 5912 | 11,451 |
| NHWA | 5369 | 5753 | 11,122 |
| BAC | 2363 | 2652 | 5,015 |
| NHBAC | 2295 | 2618 | 4,913 |
| BA | 2246 | 2551 | 4,797 |
| NHBA | 2193 | 2525 | 4,718 |
| H | 663 | 407 | 1,070 |
| HWAC | 565 | 353 | 918 |
| HWA | 523 | 335 | 858 |
| TOM | 227 | 194 | 421 |
| NHTOM | 184 | 176 | 360 |
| IAC | 164 | 127 | 291 |
| NHIAC | 106 | 99 | 205 |
| AAC | 82 | 116 | 198 |
| NHAAC | 72 | 109 | 181 |
| IA | 72 | 61 | 133 |
| AA | 51 | 82 | 133 |
| NHAA | 45 | 77 | 122 |
| HBAC | 68 | 34 | 102 |
| HIAC | 58 | 28 | 86 |
| NHIA | 39 | 41 | 80 |
| HBA | 53 | 26 | 79 |
| HTOM | 43 | 18 | 61 |
| HIA | 33 | 20 | 53 |
| NAC | 16 | 22 | 38 |
| NHNAC | 9 | 18 | 27 |
| HAAC | 10 | 7 | 17 |
| NA | 6 | 7 | 13 |
| HNAC | 7 | 4 | 11 |
| HAA | 6 | 5 | 11 |
| HNA | 5 | 3 | 8 |
| NHNA | 1 | 4 | 5 |
• Charles County population
27.6 mi,
335°
• St. Mary's County
16.7 mi,
62°
• Calvert County
32.2 mi,
27°
• Caroline County
30.3 mi,
259°
• King George County
22.7 mi,
300°
• King William County
31.8 mi,
209°
• Northumberland County
28.9 mi,
127°
• Essex County
13.9 mi,
212°
• Richmond County
12.2 mi,
160°
• King and Queen County
27.8 mi,
191°
[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
See note 29 Virginia Notes
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