Fairfax County: Demographics & People
About 1,147,837 people live in Fairfax County, in 414,101 households. Median age 38.6 years. (0.8y older than Virginia). Population is 20% Asian and 18% Hispanic or Latino. County is losing 28,691 residents per year (2022-2023). County health: 24% adult obesity, 8% smoke.
- 2.8 people per household (vs Virginia avg 2.6).
- 61 dependents per 100 working-age (youth + seniors / 18-64) (vs Virginia 62).
Population & Trend
Current population 1,147,837; figures track the most recent Census ACS 5-year estimates.
| Population | 1,147,837 people (vs Virginia 42,214) |
|---|---|
| Total Town Population | 1,147,837 people |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Age Distribution
Median age 38.6y is 0.3 years younger than the U.S. median (38.9y).
| Age Summary · Total Pop | 1,147,837 |
|---|---|
| Age Summary · Under 18 | 262,310 |
| Age Summary · 18 To 34 | 245,098.0× |
| Age Summary · 35 To 64 | 468,494.0× |
| Age Summary · 65 Plus | 171,935 |
| Age Summary · Pct Under 18 | 22.9% |
| Age Summary · Pct 18 To 34 | 21.4% |
| Age Summary · Pct 35 To 64 | 40.8% |
| Median age | 38.6 years (vs Virginia 37.8y) |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 1,147,837 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| Census Demographics · Total Population | 1,147,837 people |
|---|---|
| White residents | 564,082 |
| Black residents | 110,478 |
| Asian residents | 228,940 |
| Census Demographics · Aian | 5,846 |
| Census Demographics · Nhpi | 508 |
| Census Demographics · Other Race | 84,304 |
| Census Demographics · Two Or More Races | 153,679 |
| Diversity Index | 68.6% |
| Asian population | 19.9% (vs Virginia 5.6%) |
| Black population | 9.6% (vs Virginia 18.2%) |
| Hispanic or Latino population | 17.6% (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). 14.9% are foreign-born — near the U.S. average of 13.9%.
| Census Citizenship · Total | 1,147,837 |
|---|---|
| Census Citizenship · Native | 793,821 |
| Residents born in this state | 331,260 |
| Residents born in another state | 429,660 |
| Census Citizenship · Foreign Born | 170,767 |
| Census Citizenship · Naturalized | 57,229 |
| Census Citizenship · Non Citizen | 32,901 |
| Foreign-born residents | 14.9% |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Households & Family Composition
414,101 households.
| Family households | 288,423 households (vs Virginia 9,367) |
|---|---|
| Total households | 414,101 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 28,691 residents per year on net (IRS migration data).
| Migration · People moving in (annual) | 1,133,831 |
|---|---|
| Migration · People moving out (annual) | 1,162,522 |
| Migration · Net migration (in − out) | -28,691 |
| 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 | 1,132,414 |
|---|---|
| With Disability | 90,426 |
| Pct With Disability | 8.0% |
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 | 10,398 |
|---|
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Other
| Census Mobility · Total | 1,135,009 |
|---|---|
| Census Mobility · Same House | 986,943 |
| Census Mobility · Same County | 63,620 |
| Census Mobility · Diff County Same State | 32,189 |
| Census Mobility · Diff State | 36,489 |
| Census Mobility · From Abroad | 15,768 |
| Census Mobility · Moved Total | 148,066 |
| Census Mobility · Pct Moved In Year | 13.1% |
| Pct White | 49.1% |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29