Census tract · Fairfax County
Census Tract 4820.01, Fairfax County, Virginia
Census Tract 4820.01, GEOID 51059482001, in Fairfax County, Virginia, mostly within Reston (58% of its census blocks). 4,855 residents in the ACS 2020-2024 5-year estimates (±471); the 2020 Census counted 4,874.
Residents, 2020-2024
4,855
±471 (90% margin)
2020 Census count: 4,874
Median household income
$227,875
±$18,828 (90% margin)
Fairfax County: $153,637
Median home value
$904,400
±$44,851 (90% margin)
Fairfax County: $732,800
Median gross rent
$3,218
±$267 (90% margin)
Fairfax County: $2,276
Where is Census Tract 4820.01?
Census Tract 4820.01 is one of 274 census tracts in Fairfax County, Virginia. It covers 1.59 square miles of land, 3,063 residents per square mile in 2020. Its GEOID, 51059482001, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Reston | 58% |
| Great Falls Crossing | 33% |
| Dranesville | 9% |
7 census tracts border Census Tract 4820.01: Tract 4804.01 ($250,000 or more), Tract 4805.01 ($250,000 or more), Tract 4805.04 ($162,250), Tract 4819 ($173,904), Tract 4820.02 ($179,375), Tract 4821 ($102,589) and Tract 4822.01 ($118,750). 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 4820.01?
The 2020-2024 American Community Survey puts Census Tract 4820.01's population at 4,855 (±471) in 1,771 households; the 2020 Census counted 4,874 residents and 1,777 housing units.
| Measure | Tract 4820.01 | Reston |
|---|---|---|
| Total population | 4,855 ±471 | 64,414 |
| Households | 1,771 ±188 | 28,701 |
| Average household size | 2.74 ±0.18 | 2.24 |
| Housing units | 1,805 ±191 | 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 4820.01?
The median resident of Census Tract 4820.01 is 44.7 years old; 22.2% are under 18 and 15.4% are 65 or older. The largest group is non-Hispanic white residents at 63.5%, then Hispanic or Latino residents (of any race) at 12.3%. 20.7% of residents were born outside the United States.
| Measure | Tract 4820.01 | Reston |
|---|---|---|
| Median age | 44.7 ±7.0 | 40.1 |
| Under 18 years | 22.2% ±4.9 pts | 18.6% |
| 65 years and over | 15.4% ±2.7 pts | 16.2% |
| Hispanic or Latino (any race) | 12.3% ±5.3 pts | 16.4% |
| White alone, not Hispanic | 63.5% ±8.6 pts | 57.6% |
| Black or African American alone, not Hispanic | 3.6% ±2.0 pts | 7.9% |
| Asian alone, not Hispanic | 10.0% ±2.7 pts | 10.9% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Two or more races, not Hispanic | 10.0% ±6.8 pts | 6.5% |
| Some other race alone, not Hispanic | 0.6% ±0.9 pts | 0.7% |
| Born outside the United States | 20.7% ±4.9 pts | 24.6% |
| Speak a language other than English at home (age 5+) | 28.0% ±7.2 pts | 30.3% |
| Civilian veterans (age 18+) | 5.7% ±2.3 pts | 5.8% |
| With a disability | 5.9% ±1.9 pts | 8.7% |
| No health insurance coverage | 0.9% ±0.9 pts | 5.7% |
| High school graduate or higher (age 25+) | 99.3% ±1.1 pts | 96.2% |
| Bachelor's degree or higher (age 25+) | 79.2% ±5.3 pts | 72.0% |
| Graduate or professional degree (age 25+) | 42.7% ±5.4 pts | 34.5% |
| Lived in the same house a year earlier | 90.8% ±6.8 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 4820.01 earn?
Half of the 1,771 households in Census Tract 4820.01 earn less than $227,875 a year (±$18,828), against $153,637 across Fairfax County: 46th highest of the county's 270 tracts with a reliable estimate.
| Measure | Tract 4820.01 | Reston |
|---|---|---|
| Median household income | $227,875 ±$18,828 | $148,710 |
| Mean household income | $259,398 ±$21,129 | $181,447 |
| Per capita income | $96,286 ±$11,074 | $81,656 |
| People below the poverty line | 3.5% ±3.2 pts | 5.7% |
| Children under 18 below the poverty line | 2.9% ±4.2 pts | 6.6% |
| Households receiving SNAP | 0.4% ±0.6 pts | 3.5% |
| Households with a computer | 99.5% ±0.7 pts | 98.5% |
| Households with a broadband subscription | 99.5% ±0.7 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 4820.01?
Owners occupy 92.7% of Census Tract 4820.01's occupied homes and renters 7.3%. The median owner-occupied home is valued at $904,400 by its owner (±$44,851). The median renter pays $3,218 a month including utilities.
| Measure | Tract 4820.01 | Reston |
|---|---|---|
| Median home value (owner-occupied) | $904,400 ±$44,851 | $642,000 |
| Median gross rent | $3,218 ±$267 | $2,231 |
| Renters paying 35% or more of income on rent | 15.4% ±19.2 pts | 28.8% |
| Median monthly owner costs, with a mortgage | $3,527 ±$409 | $2,861 |
| Owner-occupied homes | 92.7% ±3.8 pts | 60.6% |
| Renter-occupied homes | 7.3% ±3.8 pts | 39.4% |
| Housing units | 1,805 ±191 | 30,485 |
| Single-family detached homes | 61.2% ±5.1 pts | 20.2% |
| Mobile homes | 0.0% ±2.2 pts | 0.1% |
| Built 2020 or later | 0.0% ±2.2 pts | 2.4% |
| Built 2010 to 2019 | 0.6% ±0.9 pts | 10.6% |
| Built 1939 or earlier | 0.0% ±2.2 pts | 0.4% |
| Households with no vehicle | 1.1% ±1.2 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 4820.01 get to work?
47.2% of Census Tract 4820.01's workers drive alone and 42.8% work from home. The average trip to work takes 29.8 minutes. The unemployment rate in 2020-2024 averaged 6.2%.
| Measure | Tract 4820.01 | Reston |
|---|---|---|
| In the labor force (age 16+) | 73.7% ±5.2 pts | 74.0% |
| Unemployment rate | 6.2% ±4.0 pts | 5.0% |
| Drove alone to work | 47.2% ±9.2 pts | 52.1% |
| Carpooled | 5.0% ±2.3 pts | 5.3% |
| Public transportation | 3.2% ±2.2 pts | 5.6% |
| Walked | 0.0% ±1.5 pts | 1.5% |
| Worked from home | 42.8% ±9.5 pts | 33.5% |
| Mean travel time to work | 29.8 min ±2.8 | 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 4820.01 compare with the other tracts in Fairfax County?
Among Fairfax County's tracts with a reliable estimate, Census Tract 4820.01 ranks as shown below (1 = highest).
| Measure | In Fairfax County | In Reston |
|---|---|---|
| Population | 90th of 271 | 6th of 19 |
| Residents per square mile | 210th of 274 | 15th of 19 |
| Median household income | 46th of 270 | 3rd of 19 |
| Per capita income | 41st of 271 | 8th of 19 |
| Median home value | 60th of 263 | 4th of 19 |
| Median gross rent | 49th of 248 | 1st of 17 |
| Bachelor's degree or higher | 55th of 270 | 7th of 19 |
| Median age | 52nd of 271 | 7th of 19 |
| Owner-occupied share | 49th of 266 | 3rd of 19 |
The tracts next to it on Fairfax County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4407.02 | 43rd | $228,938±$27,610 · within the margin of this tract |
| Tract 4512 | 44th | $227,969±$65,326 · within the margin of this tract |
| Tract 4157 | 45th | $227,888±$35,419 · within the margin of this tract |
| Tract 4820.01 | 46th | $227,875±$18,828 |
| Tract 4605.04 | 47th | $227,169±$19,908 · within the margin of this tract |
| Tract 4609 | 48th | $220,417±$23,456 · within the margin of this tract |
| Tract 4917.05 | 49th | $219,500±$38,037 · 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 4820.01?
1 of the 18 figures for Census Tract 4820.01 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