Census tract · Fairfax County
Census Tract 4819, Fairfax County, Virginia
Census Tract 4819, GEOID 51059481900, in Fairfax County, Virginia, mostly within Reston (61% of its census blocks). 6,041 residents in the ACS 2020-2024 5-year estimates (±888); the 2020 Census counted 5,821.
Residents, 2020-2024
6,041
±888 (90% margin)
2020 Census count: 5,821
Median household income
$173,904
±$53,130 (90% margin)
Fairfax County: $153,637
Median home value
$955,900
±$340,549 (90% margin)
Fairfax County: $732,800
Median gross rent
$2,068
±$231 (90% margin)
Fairfax County: $2,276
Where is Census Tract 4819?
Census Tract 4819 is one of 274 census tracts in Fairfax County, Virginia. It covers 4.06 square miles of land, 1,433 residents per square mile in 2020. Its GEOID, 51059481900, names it uniquely (how tract numbers and GEOIDs work).
7 census tracts border Census Tract 4819: Tract 4601 ($215,139), Tract 4803.01 ($250,000 or more), Tract 4804.01 ($250,000 or more), Tract 4820.01 ($227,875), Tract 4822.01 ($118,750), Tract 4822.05 ($141,532) and Tract 4824 ($250,000 or more). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 4819?
The 2020-2024 American Community Survey puts Census Tract 4819's population at 6,041 (±888) in 2,350 households; the 2020 Census counted 5,821 residents and 2,364 housing units.
| Measure | Tract 4819 | Reston |
|---|---|---|
| Total population | 6,041 ±888 | 64,414 |
| Households | 2,350 ±340 | 28,701 |
| Average household size | 2.56 ±0.21 | 2.24 |
| Housing units | 2,506 ±365 | 30,485 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 4819?
The median resident of Census Tract 4819 is 45.8 years old; 22.1% are under 18 and 16.7% are 65 or older. The largest group is non-Hispanic white residents at 64.3%, then non-Hispanic Asian residents at 15.1%. 32.0% of residents were born outside the United States.
| Measure | Tract 4819 | Reston |
|---|---|---|
| Median age | 45.8 ±4.2 | 40.1 |
| Under 18 years | 22.1% ±4.8 pts | 18.6% |
| 65 years and over | 16.7% ±3.6 pts | 16.2% |
| Hispanic or Latino (any race) | 8.1% ±4.9 pts | 16.4% |
| White alone, not Hispanic | 64.3% ±6.9 pts | 57.6% |
| Black or African American alone, not Hispanic | 10.2% ±4.5 pts | 7.9% |
| Asian alone, not Hispanic | 15.1% ±4.9 pts | 10.9% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.1 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Two or more races, not Hispanic | 2.2% ±1.3 pts | 6.5% |
| Some other race alone, not Hispanic | 0.0% ±0.7 pts | 0.7% |
| Born outside the United States | 32.0% ±8.0 pts | 24.6% |
| Speak a language other than English at home (age 5+) | 36.5% ±10.1 pts | 30.3% |
| Civilian veterans (age 18+) | 3.1% ±2.4 pts | 5.8% |
| With a disability | 11.2% ±3.8 pts | 8.7% |
| No health insurance coverage | 2.1% ±1.3 pts | 5.7% |
| High school graduate or higher (age 25+) | 96.0% ±2.7 pts | 96.2% |
| Bachelor's degree or higher (age 25+) | 73.2% ±7.2 pts | 72.0% |
| Graduate or professional degree (age 25+) | 40.9% ±10.4 pts | 34.5% |
| Lived in the same house a year earlier | 83.1% ±7.2 pts | 80.4% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 4819 earn?
Half of the 2,350 households in Census Tract 4819 earn less than $173,904 a year (±$53,130), against $153,637 across Fairfax County: 108th highest of the county's 270 tracts with a reliable estimate.
| Measure | Tract 4819 | Reston |
|---|---|---|
| Median household income | $173,904 ±$53,130 | $148,710 |
| Mean household income | $257,722 ±$50,461 | $181,447 |
| Per capita income | $101,334 ±$17,872 | $81,656 |
| People below the poverty line | 5.3% ±3.5 pts | 5.7% |
| Children under 18 below the poverty line | 3.8% ±6.3 pts | 6.6% |
| Households receiving SNAP | 5.7% ±3.2 pts | 3.5% |
| Households with a computer | 91.7% ±5.0 pts | 98.5% |
| Households with a broadband subscription | 94.3% ±3.9 pts | 97.0% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 4819?
Owners occupy 71.0% of Census Tract 4819's occupied homes and renters 29.0%. The median owner-occupied home is valued at $955,900 by its owner (±$340,549). The median renter pays $2,068 a month including utilities, and 44.4% of renters pay 35% or more of their income on rent.
| Measure | Tract 4819 | Reston |
|---|---|---|
| Median home value (owner-occupied) | $955,900 ±$340,549 | $642,000 |
| Median gross rent | $2,068 ±$231 | $2,231 |
| Renters paying 35% or more of income on rent | 44.4% ±15.2 pts | 28.8% |
| Median monthly owner costs, with a mortgage | $3,236 ±$1,051 | $2,861 |
| Owner-occupied homes | 71.0% ±8.4 pts | 60.6% |
| Renter-occupied homes | 29.0% ±8.4 pts | 39.4% |
| Housing units | 2,506 ±365 | 30,485 |
| Single-family detached homes | 46.8% ±9.5 pts | 20.2% |
| Mobile homes | 0.6% ±1.0 pts | 0.1% |
| Built 2020 or later | 2.8% ±2.1 pts | 2.4% |
| Built 2010 to 2019 | 4.4% ±2.8 pts | 10.6% |
| Built 1939 or earlier | 0.6% ±1.0 pts | 0.4% |
| Households with no vehicle | 4.9% ±3.7 pts | 4.6% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 4819 get to work?
44.0% of Census Tract 4819's workers drive alone and 43.8% work from home. The average trip to work takes 32.0 minutes.
| Measure | Tract 4819 | Reston |
|---|---|---|
| In the labor force (age 16+) | 73.4% ±6.2 pts | 74.0% |
| Unemployment rate | 3.3% ±2.5 pts | 5.0% |
| Drove alone to work | 44.0% ±10.7 pts | 52.1% |
| Carpooled | 4.2% ±2.5 pts | 5.3% |
| Public transportation | 6.0% ±5.4 pts | 5.6% |
| Walked | 0.6% ±1.1 pts | 1.5% |
| Worked from home | 43.8% ±12.6 pts | 33.5% |
| Mean travel time to work | 32.0 min ±3.9 | 26.0 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 4819 compare with the other tracts in Fairfax County?
Among Fairfax County's tracts with a reliable estimate, Census Tract 4819 ranks as shown below (1 = highest).
| Measure | In Fairfax County | In Reston |
|---|---|---|
| Population | 45th of 271 | 3rd of 19 |
| Residents per square mile | 247th of 274 | 17th of 19 |
| Median household income | 108th of 270 | 6th of 19 |
| Per capita income | 33rd of 271 | 7th of 19 |
| Median home value | 46th of 263 | 3rd of 19 |
| Median gross rent | 203rd of 248 | 11th of 17 |
| Bachelor's degree or higher | 107th of 270 | 14th of 19 |
| Median age | 42nd of 271 | 5th of 19 |
| Owner-occupied share | 161st of 266 | 8th of 19 |
The tracts next to it on Fairfax County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4808.01 | 105th | $177,083±$28,705 · within the margin of this tract |
| Tract 4507.01 | 106th | $176,042±$28,233 · within the margin of this tract |
| Tract 4510 | 107th | $175,625±$33,022 · within the margin of this tract |
| Tract 4819 | 108th | $173,904±$53,130 |
| Tract 4320 | 109th | $173,631±$41,758 · within the margin of this tract |
| Tract 4711 | 110th | $173,188±$37,815 · within the margin of this tract |
| Tract 4825.05 | 111th | $172,420±$39,273 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 4819?
1 of the 18 figures for Census Tract 4819 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections