2017 Growth Rate
2.98%
County Website
State
Founded
1757
County Seat
Leesburg
Lat/Lng
Loudoun County, Virginia's estimated population is 396,995 with a growth rate of 2.98% in the past year according to the most recent United States census data. Loudoun County, Virginia is the 4th largest county in Virginia.
| Year | Population | Growth | Growth Rate |
| 2018 | 406,850 | 9,855 | 2.48% |
| 2017 | 396,995 | 11,471 | 2.98% |
| 2016 | 385,524 | 11,470 | 3.07% |
| 2015 | 374,054 | 11,764 | 3.25% |
| 2014 | 362,290 | 12,312 | 3.52% |
| 2013 | 349,978 | 12,097 | 3.58% |
| 2012 | 337,881 | 11,562 | 3.54% |
| 2011 | 326,319 | 10,840 | 3.44% |
| 2010 | 315,479 | 229,350 | 266.29% |
| 1990 | 86,129 | 28,702 | 49.98% |
| 1980 | 57,427 | 20,277 | 54.58% |
| 1970 | 37,150 | 12,601 | 51.33% |
| 1960 | 24,549 | 3,402 | 16.09% |
| 1950 | 21,147 | 856 | 4.22% |
| 1940 | 20,291 | 439 | 2.21% |
| 1930 | 19,852 | -725 | -3.52% |
| 1920 | 20,577 | -590 | -2.79% |
| 1910 | 21,167 | -781 | -3.56% |
| 1900 | 21,948 | -1,326 | -5.70% |
| 1890 | 23,274 | -360 | -1.52% |
| 1880 | 23,634 | 2,705 | 12.92% |
| 1870 | 20,929 | -845 | -3.88% |
| 1860 | 21,774 | -305 | -1.38% |
| 1850 | 22,079 | 1,648 | 8.07% |
| 1840 | 20,431 | -1,508 | -6.87% |
| 1830 | 21,939 | -763 | -3.36% |
| 1820 | 22,702 | 1,364 | 6.39% |
| 1810 | 21,338 | 815 | 3.97% |
| 1800 | 20,523 | 1,561 | 8.23% |
| 1790 | 18,962 | 0.00% |
| Race | Population | Percentage |
| White | 250,975 | 67.01% |
| Asian | 64,423 | 17.20% |
| Black or African American | 28,333 | 7.56% |
| Two or More Races | 18,290 | 4.88% |
| Some Other Race | 11,230 | 3.00% |
| American Indian and Alaska Native | 977 | 0.26% |
| Native Hawaiian and Other Pacific Islander | 330 | 0.09% |
35.8
35.5
36.1
There are 265,795 adults, (31,172 of whom are seniors) in Loudoun County, Virginia.
Female
188,983
50.45%
Male
185,575
49.55%
| Type | Count | Average Size | Owned |
| All | 121,299 | 3.07 | 77.9 |
| Married | 79,861 | 3.61 | 85.9 |
| Non Family | 27,022 | 1.34 | 62.7 |
| Female | 10,223 | 3.31 | 60.1 |
| Male | 4,193 | 3.36 | 65.2 |
| Education Attained | Count | Percentage |
| Less Than 9th Grade | 8,585 | 3.59% |
| 9th to 12th Grade | 7,086 | 2.96% |
| High School Graduate | 30,823 | 12.87% |
| Some College | 35,387 | 14.78% |
| Associates Degree | 14,379 | 6.00% |
| Bachelors Degree | 84,709 | 35.37% |
| Graduate Degree | 58,497 | 24.43% |
| Name | Total | High School | Bachelors |
| White | 143,457 | 139,887 | 90,489 |
| Asian | 42,484 | 39,120 | 30,860 |
| Hispanic | 28,776 | 21,600 | 9,086 |
| Black | 18,197 | 17,027 | 8,991 |
| Multiple Races | 7,247 | 6,607 | 3,900 |
| Other Race | 6,675 | 4,808 | 1,844 |
| Native American | 656 | 529 | 263 |
| Islander | 234 | 229 | 106 |
The highest rate of high school graduation is among islander people with a rate of 97.86%.
The highest rate of bachelors degrees is among asian people with a rate of 72.64%.
$67,933
Average Earnings
$90,900
Average Male
$51,706
Average Female
68.63% of Loudoun County, Virginia residents speak only English, while 31.37% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 10.85% of the population.
| Name | Total | In Poverty | Poverty Rate |
| White | 215,134 | 6,409 | 2.98% |
| Hispanic | 50,058 | 3,462 | 6.92% |
| Black | 27,990 | 1,731 | 6.18% |
| Asian | 64,391 | 1,684 | 2.62% |
| Multiple | 18,177 | 794 | 4.37% |
| Other | 11,097 | 601 | 5.42% |
| Native | 971 | 97 | 9.99% |
| Islander | 330 | 5 | 1.52% |
3.68%
Overall Poverty Rate
3.04%
Male Poverty Rate
4.31%
Female Poverty Rate
The race most likely to be in poverty in Loudoun County, Virginia is Native, with 9.99% below the poverty level.
The race least likely to be in poverty in Loudoun County, Virginia is Islander, with 1.52% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0.83%. Among those working part-time, it was 6.29%, and for those that did not work, the poverty rate was 9.03%.
61.1%
Overall Marriage Rate
63.4%
Male Marriage Rate
58.9%
Female Marriage Rate
The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.
| Name | Veterans | % of Total |
| White | 17,085 | 9.45% |
| Black | 2,175 | 10.63% |
| Hispanic | 1,320 | 3.94% |
| Asian | 699 | 1.53% |
| 2 or More | 560 | 6.50% |
| Other | 238 | 3.02% |
| Indian | 143 | 19.56% |
| Hawaiian | 48 | 17.02% |
1.98%
Veteran Poverty Rate
13.62%
Veteran Disability Rate
76.1%
Labor Force Participation
72.7%
Employment Rate
3.8%
Unemployment Rate
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
76.12%
Native Born
23.88%
Foreign Born
10.26%
Non Citizen
76.12% of Loudoun County, Virginia residents were born in the United States, with 33.94% having been born in Virginia. 10.26% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.
| City | 2010 Census | 2016 Estimated | Growth | Growth Rate |
| Leesburg | 42616 | 52607 | 9991 | 23.44% |
| Herndon | 23292 | 24393 | 1101 | 4.73% |
| Purcellville | 7727 | 9469 | 1742 | 22.54% |
| Lovettsville | 1613 | 1985 | 372 | 23.06% |
| Middleburg | 673 | 828 | 155 | 23.03% |
| Round Hill | 539 | 659 | 120 | 22.26% |
| Hamilton | 508 | 625 | 117 | 23.03% |
| Hillsboro | 80 | 98 | 18 | 22.50% |