Census tract · Fairfax County
Census Tract 4155, Fairfax County, Virginia
Census Tract 4155, GEOID 51059415500, in Fairfax County, Virginia, mostly within Fort Hunt (71% of its census blocks). 6,289 residents in the ACS 2020-2024 5-year estimates (±566); the 2020 Census counted 6,306.
Residents, 2020-2024
6,289
±566 (90% margin)
2020 Census count: 6,306
Median household income
$146,989
±$48,028 (90% margin)
Fairfax County: $153,637
Median home value
$833,100
±$29,402 (90% margin)
Fairfax County: $732,800
Median gross rent
$829
±$224 (90% margin)
Fairfax County: $2,276
Where is Census Tract 4155?
Census Tract 4155 is one of 274 census tracts in Fairfax County, Virginia. It covers 1.49 square miles of land, 4,232 residents per square mile in 2020. Its GEOID, 51059415500, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Fort Hunt | 71% |
| Hybla Valley | 29% |
5 census tracts border Census Tract 4155: Tract 4154.02 ($185,481), Tract 4156 ($250,000 or more), Tract 4158 ($210,300), Tract 4159 ($184,821) and Tract 4215 ($77,070). 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 4155?
The 2020-2024 American Community Survey puts Census Tract 4155's population at 6,289 (±566) in 2,265 households; the 2020 Census counted 6,306 residents and 2,311 housing units.
| Measure | Tract 4155 | Fort Hunt |
|---|---|---|
| Total population | 6,289 ±566 | 16,700 |
| Households | 2,265 ±241 | 5,957 |
| Average household size | 2.66 ±0.18 | 2.79 |
| Housing units | 2,315 ±260 | 6,081 |
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 4155?
The median resident of Census Tract 4155 is 44.0 years old; 22.0% are under 18 and 24.4% are 65 or older. The largest group is non-Hispanic white residents at 66.9%, then non-Hispanic Black residents at 11.9%. 17.9% of residents were born outside the United States.
| Measure | Tract 4155 | Fort Hunt |
|---|---|---|
| Median age | 44.0 ±3.7 | 43.0 |
| Under 18 years | 22.0% ±4.3 pts | 26.8% |
| 65 years and over | 24.4% ±5.4 pts | 21.0% |
| Hispanic or Latino (any race) | 11.3% ±7.0 pts | 6.2% |
| White alone, not Hispanic | 66.9% ±7.3 pts | 85.0% |
| Black or African American alone, not Hispanic | 11.9% ±6.5 pts | 1.5% |
| Asian alone, not Hispanic | 5.3% ±3.0 pts | 3.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.1 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.6 pts | 0.0% |
| Two or more races, not Hispanic | 4.1% ±2.5 pts | 3.3% |
| Some other race alone, not Hispanic | 0.5% ±0.7 pts | 0.6% |
| Born outside the United States | 17.9% ±4.9 pts | 8.3% |
| Speak a language other than English at home (age 5+) | 27.5% ±9.3 pts | 10.6% |
| Civilian veterans (age 18+) | 13.5% ±4.7 pts | 15.5% |
| With a disability | 12.3% ±3.8 pts | 8.4% |
| No health insurance coverage | 4.3% ±3.7 pts | 0.7% |
| High school graduate or higher (age 25+) | 91.4% ±5.9 pts | 98.1% |
| Bachelor's degree or higher (age 25+) | 64.9% ±8.2 pts | 80.7% |
| Graduate or professional degree (age 25+) | 30.0% ±8.8 pts | 42.4% |
| Lived in the same house a year earlier | 90.8% ±4.7 pts | 89.0% |
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 4155 earn?
Half of the 2,265 households in Census Tract 4155 earn less than $146,989 a year (±$48,028), against $153,637 across Fairfax County: 155th highest of the county's 270 tracts with a reliable estimate. 5.5% of residents live below the poverty line.
| Measure | Tract 4155 | Fort Hunt |
|---|---|---|
| Median household income | $146,989 ±$48,028 | $216,038 |
| Mean household income | $169,683 ±$21,505 | $270,002 |
| Per capita income | $63,254 ±$8,635 | $96,866 |
| People below the poverty line | 5.5% ±3.4 pts | 2.2% |
| Children under 18 below the poverty line | 5.4% ±6.1 pts | 1.8% |
| Households receiving SNAP | 15.0% ±7.5 pts | 1.8% |
| Households with a computer | 98.8% ±1.9 pts | 98.3% |
| Households with a broadband subscription | 94.0% ±5.3 pts | 97.4% |
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 4155?
Owners occupy 75.9% of Census Tract 4155's occupied homes and renters 24.1%. The median owner-occupied home is valued at $833,100 by its owner (±$29,402). The median renter pays $829 a month including utilities, and 43.0% of renters pay 35% or more of their income on rent.
| Measure | Tract 4155 | Fort Hunt |
|---|---|---|
| Median home value (owner-occupied) | $833,100 ±$29,402 | $927,400 |
| Median gross rent | $829 ±$224 | $3,500 or more |
| Renters paying 35% or more of income on rent | 43.0% ±25.2 pts | 25.6% |
| Median monthly owner costs, with a mortgage | $3,302 ±$398 | $3,897 |
| Owner-occupied homes | 75.9% ±7.9 pts | 94.1% |
| Renter-occupied homes | 24.1% ±7.9 pts | 5.9% |
| Housing units | 2,315 ±260 | 6,081 |
| Single-family detached homes | 69.1% ±7.7 pts | 98.3% |
| Mobile homes | 0.0% ±1.7 pts | 0.0% |
| Built 2020 or later | 2.9% ±2.9 pts | 0.9% |
| Built 2010 to 2019 | 4.4% ±3.1 pts | 3.5% |
| Built 1939 or earlier | 0.6% ±0.9 pts | 1.4% |
| Households with no vehicle | 7.2% ±5.7 pts | 0.4% |
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 4155 get to work?
54.1% of Census Tract 4155's workers drive alone and 27.6% work from home. The average trip to work takes 31.5 minutes. The unemployment rate in 2020-2024 averaged 11.1%.
| Measure | Tract 4155 | Fort Hunt |
|---|---|---|
| In the labor force (age 16+) | 58.1% ±6.0 pts | 64.8% |
| Unemployment rate | 11.1% ±6.8 pts | 3.2% |
| Drove alone to work | 54.1% ±10.1 pts | 58.9% |
| Carpooled | 8.4% ±4.8 pts | 5.0% |
| Public transportation | 7.0% ±5.5 pts | 2.6% |
| Walked | 1.2% ±1.8 pts | 0.3% |
| Worked from home | 27.6% ±8.9 pts | 31.2% |
| Mean travel time to work | 31.5 min ±5.9 | 31.2 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 4155 compare with the other tracts in Fairfax County?
Among Fairfax County's tracts with a reliable estimate, Census Tract 4155 ranks as shown below (1 = highest).
| Measure | In Fairfax County | In Fort Hunt |
|---|---|---|
| Population | 39th of 271 | 1st of 5 |
| Residents per square mile | 152nd of 274 | 1st of 5 |
| Median household income | 155th of 270 | 5th of 5 |
| Per capita income | 175th of 271 | 5th of 5 |
| Median home value | 83rd of 263 | 5th of 5 |
| Median gross rent | 246th of 248 | 4th of 4 |
| Poverty rate | 48th of 70 | 1st of 1 |
| Bachelor's degree or higher | 162nd of 270 | 5th of 5 |
| Median age | 65th of 271 | 4th of 5 |
| Owner-occupied share | 149th of 266 | 5th of 5 |
The tracts next to it on Fairfax County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4612.02 | 152nd | $148,796±$22,122 · within the margin of this tract |
| Tract 4301.02 | 153rd | $147,778±$17,736 · within the margin of this tract |
| Tract 4309.01 | 154th | $147,708±$14,915 · within the margin of this tract |
| Tract 4155 | 155th | $146,989±$48,028 |
| Tract 4916.02 | 156th | $146,759±$22,707 · within the margin of this tract |
| Tract 4712.03 | 157th | $146,667±$52,679 · within the margin of this tract |
| Tract 4809.01 | 157th | $146,667±$31,975 · 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 4155?
Every figure for Census Tract 4155 on this page has a coefficient of variation under 40%, the Census Bureau's threshold for a usable estimate.
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