Loudoun County: Demographics & People
Loudoun County is home to 432,998 people, in 143,032 households. Median age 38.2 years. Population is 22% Asian and 14% Hispanic or Latino. County is losing 1,912 residents per year (2022-2023). County health: 30% adult obesity, 9% smoke.
- 3.0 people per household (vs Virginia avg 2.6).
- 60 dependents per 100 working-age (youth + seniors / 18-64) (vs Virginia 62).
Population & Trend
Current population 432,998; figures track the most recent Census ACS 5-year estimates.
| Population | 432,998 people (vs Virginia 42,214) |
|---|---|
| Total Town Population | 329,724 people |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Age Distribution
Median age 38.2y is 0.7 years younger than the U.S. median (38.9y).
| Age Summary · Total Pop | 432,998 |
|---|---|
| Age Summary · Under 18 | 115,171 |
| Age Summary · 18 To 34 | 80,946.0× |
| Age Summary · 35 To 64 | 189,987.0× |
| Age Summary · 65 Plus | 46,894 |
| Age Summary · Pct Under 18 | 26.6% |
| Age Summary · Pct 18 To 34 | 18.7% |
| Age Summary · Pct 35 To 64 | 43.9% |
| Median age | 38.2 years (vs Virginia 37.8y) |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 432,998 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| Census Demographics · Total Population | 432,998 people |
|---|---|
| White residents | 228,302 |
| Black residents | 33,411 |
| Asian residents | 94,508 |
| Census Demographics · Aian | 1,253 |
| Census Demographics · Nhpi | 221 |
| Census Demographics · Other Race | 20,804 |
| Census Demographics · Two Or More Races | 54,499 |
| Diversity Index | 65.0% |
| Asian population | 21.8% (vs Virginia 5.6%) |
| Black population | 7.7% (vs Virginia 18.2%) |
| Hispanic or Latino population | 14.3% (vs Virginia 10.1%) |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 13.7% are foreign-born — near the U.S. average of 13.9%.
| Census Citizenship · Total | 432,998 |
|---|---|
| Census Citizenship · Native | 314,188 |
| Residents born in this state | 145,934 |
| Residents born in another state | 157,157 |
| Census Citizenship · Foreign Born | 59,368 |
| Census Citizenship · Naturalized | 20,938 |
| Census Citizenship · Non Citizen | 11,097 |
| Foreign-born residents | 13.7% |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Households & Family Composition
143,032 households.
| Family households | 111,950 households (vs Virginia 9,367) |
|---|---|
| Total households | 143,032 households (vs Virginia 14,324) |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Residential Stability & Migration
How long residents have lived here and where they came from. The surrounding county is losing 1,912 residents per year on net (IRS migration data).
| Migration · People moving in (annual) | 459,164 |
|---|---|
| Migration · People moving out (annual) | 461,076 |
| Migration · Net migration (in − out) | -1,912 |
| Migration · Year | 2022-2023 |
Sources: IRS SOI Migration 2022-2023
Disability
Census ACS measures self-reported functional limitations — vision, hearing, mobility, cognitive, self-care, or independent-living. The U.S. baseline disability rate is about 12–13%; rates trend higher with median age.
| Census Disability · Total Pop | 430,931 |
|---|---|
| With Disability | 30,596 |
| Pct With Disability | 7.1% |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Group Quarters
Group quarters are non-household living arrangements counted by the Census — college dormitories, nursing homes, military barracks, group homes, correctional facilities, and similar institutional or shared housing. 0 residents live in group quarters.
| Census Group Quarters · Total | 1,491 |
|---|
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Other
| Census Mobility · Total | 428,053 |
|---|---|
| Census Mobility · Same House | 381,930 |
| Census Mobility · Same County | 17,347 |
| Census Mobility · Diff County Same State | 13,805 |
| Census Mobility · Diff State | 10,683 |
| Census Mobility · From Abroad | 4,288 |
| Census Mobility · Moved Total | 46,123 |
| Census Mobility · Pct Moved In Year | 10.8% |
| Pct White | 52.7% |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29