Census tract · Fairfax County
Census Tract 4221.01, Fairfax County, Virginia
Census Tract 4221.01, GEOID 51059422101, in Fairfax County, Virginia, entirely within Lorton. 6,911 residents in the ACS 2020-2024 5-year estimates (±1,552); the 2020 Census counted 6,872.
Residents, 2020-2024
6,911
±1,552 (90% margin)
2020 Census count: 6,872
Median household income
$127,628
±$19,907 (90% margin)
Fairfax County: $153,637
Median home value
$614,600
±$39,345 (90% margin)
Fairfax County: $732,800
Median gross rent
$2,431
±$185 (90% margin)
Fairfax County: $2,276
Where is Census Tract 4221.01?
Census Tract 4221.01 is one of 274 census tracts in Fairfax County, Virginia. It covers 0.94 square miles of land, 7,303 residents per square mile in 2020. Its GEOID, 51059422101, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Lorton | 100% |
6 census tracts border Census Tract 4221.01: Tract 4220 ($129,945), Tract 4221.02 ($138,794), Tract 4222.01 ($169,048), Tract 4222.02 ($149,338), Tract 4327.02 ($134,150) and Tract 4924 ($134,272). 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 4221.01?
The 2020-2024 American Community Survey puts Census Tract 4221.01's population at 6,911 (±1,552) in 2,309 households; the 2020 Census counted 6,872 residents and 2,541 housing units.
| Measure | Tract 4221.01 | Lorton |
|---|---|---|
| Total population | 6,911 ±1,552 | 20,991 |
| Households | 2,309 ±343 | 6,595 |
| Average household size | 2.99 ±0.38 | 3.17 |
| Housing units | 2,641 ±346 | 7,319 |
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 4221.01?
The median resident of Census Tract 4221.01 is 32.5 years old; 25.3% are under 18 and 6.8% are 65 or older. The largest group is non-Hispanic white residents at 31.5%, then non-Hispanic Black residents at 25.4%. 31.9% of residents were born outside the United States.
| Measure | Tract 4221.01 | Lorton |
|---|---|---|
| Median age | 32.5 ±2.3 | 35.9 |
| Under 18 years | 25.3% ±6.6 pts | 26.4% |
| 65 years and over | 6.8% ±2.4 pts | 11.1% |
| Hispanic or Latino (any race) | 19.6% ±14.4 pts | 14.0% |
| White alone, not Hispanic | 31.5% ±11.7 pts | 31.2% |
| Black or African American alone, not Hispanic | 25.4% ±9.7 pts | 27.8% |
| Asian alone, not Hispanic | 14.7% ±11.5 pts | 17.9% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.6 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.5% ±0.6 pts | 0.2% |
| Two or more races, not Hispanic | 7.9% ±3.8 pts | 8.0% |
| Some other race alone, not Hispanic | 0.3% ±0.5 pts | 1.0% |
| Born outside the United States | 31.9% ±7.8 pts | 32.7% |
| Speak a language other than English at home (age 5+) | 41.3% ±12.0 pts | 43.9% |
| Civilian veterans (age 18+) | 10.9% ±4.1 pts | 12.2% |
| With a disability | 6.8% ±3.0 pts | 8.9% |
| No health insurance coverage | 8.1% ±6.2 pts | 10.1% |
| High school graduate or higher (age 25+) | 95.6% ±2.9 pts | 94.1% |
| Bachelor's degree or higher (age 25+) | 60.6% ±11.1 pts | 60.6% |
| Graduate or professional degree (age 25+) | 32.1% ±11.5 pts | 26.4% |
| Lived in the same house a year earlier | 86.6% ±7.5 pts | 86.7% |
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 4221.01 earn?
Half of the 2,309 households in Census Tract 4221.01 earn less than $127,628 a year (±$19,907), against $153,637 across Fairfax County: 193rd highest of the county's 270 tracts with a reliable estimate.
| Measure | Tract 4221.01 | Lorton |
|---|---|---|
| Median household income | $127,628 ±$19,907 | $138,685 |
| Mean household income | $143,899 ±$17,483 | $168,801 |
| Per capita income | $49,996 ±$10,513 | $54,550 |
| People below the poverty line | 10.9% ±7.9 pts | 7.4% |
| Children under 18 below the poverty line | 23.6% ±22.2 pts | 11.7% |
| Households receiving SNAP | 10.4% ±8.2 pts | 9.6% |
| Households with a computer | 99.3% ±1.1 pts | 98.4% |
| Households with a broadband subscription | 98.7% ±1.5 pts | 98.1% |
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 4221.01?
Owners occupy 53.4% of Census Tract 4221.01's occupied homes and renters 46.6%. The median owner-occupied home is valued at $614,600 by its owner (±$39,345). The median renter pays $2,431 a month including utilities, and 37.2% of renters pay 35% or more of their income on rent.
| Measure | Tract 4221.01 | Lorton |
|---|---|---|
| Median home value (owner-occupied) | $614,600 ±$39,345 | $626,500 |
| Median gross rent | $2,431 ±$185 | $2,548 |
| Renters paying 35% or more of income on rent | 37.2% ±16.2 pts | 44.1% |
| Median monthly owner costs, with a mortgage | $3,083 ±$441 | $3,013 |
| Owner-occupied homes | 53.4% ±10.6 pts | 64.4% |
| Renter-occupied homes | 46.6% ±10.6 pts | 35.6% |
| Housing units | 2,641 ±346 | 7,319 |
| Single-family detached homes | 39.0% ±9.7 pts | 36.1% |
| Mobile homes | 0.0% ±1.5 pts | 0.3% |
| Built 2020 or later | 0.0% ±1.5 pts | 1.6% |
| Built 2010 to 2019 | 1.7% ±1.9 pts | 4.5% |
| Built 1939 or earlier | 0.0% ±1.5 pts | 0.4% |
| Households with no vehicle | 0.7% ±1.1 pts | 5.0% |
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 4221.01 get to work?
56.6% of Census Tract 4221.01's workers drive alone and 26.3% work from home. The average trip to work takes 28.4 minutes. The unemployment rate in 2020-2024 averaged 5.6%.
| Measure | Tract 4221.01 | Lorton |
|---|---|---|
| In the labor force (age 16+) | 77.8% ±4.8 pts | 69.1% |
| Unemployment rate | 5.6% ±3.4 pts | 6.5% |
| Drove alone to work | 56.6% ±13.9 pts | 58.6% |
| Carpooled | 10.5% ±7.2 pts | 8.5% |
| Public transportation | 2.0% ±1.8 pts | 4.8% |
| Walked | 4.1% ±4.9 pts | 2.1% |
| Worked from home | 26.3% ±11.9 pts | 24.7% |
| Mean travel time to work | 28.4 min ±4.0 | 30.7 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 4221.01 compare with the other tracts in Fairfax County?
Among Fairfax County's tracts with a reliable estimate, Census Tract 4221.01 ranks as shown below (1 = highest).
| Measure | In Fairfax County | In Lorton |
|---|---|---|
| Population | 12th of 271 | 1st of 3 |
| Residents per square mile | 73rd of 274 | 1st of 3 |
| Median household income | 193rd of 270 | 3rd of 3 |
| Per capita income | 228th of 271 | 3rd of 3 |
| Median home value | 174th of 263 | 1st of 3 |
| Median gross rent | 134th of 248 | 2nd of 3 |
| Bachelor's degree or higher | 180th of 270 | 1st of 3 |
| Median age | 245th of 271 | 3rd of 3 |
| Owner-occupied share | 207th of 266 | 3rd of 3 |
The tracts next to it on Fairfax County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4508 | 190th | $129,583±$32,658 · within the margin of this tract |
| Tract 4224.01 | 191st | $129,054±$15,635 · within the margin of this tract |
| Tract 4616.03 | 192nd | $128,224±$29,597 · within the margin of this tract |
| Tract 4221.01 | 193rd | $127,628±$19,907 |
| Tract 4912.01 | 194th | $126,923±$26,429 · within the margin of this tract |
| Tract 4811.01 | 195th | $126,739±$23,354 · within the margin of this tract |
| Tract 4917.04 | 196th | $124,961±$32,677 · 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 4221.01?
3 of the 18 figures for Census Tract 4221.01 on this page carry a coefficient of variation over 40% and are 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