Census tract · Fairfax County
Census Tract 4159, Fairfax County, Virginia
Census Tract 4159, GEOID 51059415900, in Fairfax County, Virginia, entirely within Mount Vernon. 3,105 residents in the ACS 2020-2024 5-year estimates (±514); the 2020 Census counted 3,216.
Residents, 2020-2024
3,105
±514 (90% margin)
2020 Census count: 3,216
Median household income
$184,821
±$43,094 (90% margin)
Fairfax County: $153,637
Median home value
$786,300
±$59,800 (90% margin)
Fairfax County: $732,800
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
Fairfax County: $2,276
Where is Census Tract 4159?
Census Tract 4159 is one of 274 census tracts in Fairfax County, Virginia. It covers 1.78 square miles of land, 1,807 residents per square mile in 2020. Its GEOID, 51059415900, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Mount Vernon | 100% |
5 census tracts border Census Tract 4159: Tract 4155 ($146,989), Tract 4158 ($210,300), Tract 4160 ($116,985), Tract 4161 ($184,861) and Tract 4216 ($81,317). 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 4159?
The 2020-2024 American Community Survey puts Census Tract 4159's population at 3,105 (±514) in 1,113 households; the 2020 Census counted 3,216 residents and 1,224 housing units.
| Measure | Tract 4159 | Mount Vernon |
|---|---|---|
| Total population | 3,105±514 | 13,122 |
| Households | 1,113±162 | 4,850 |
| Average household size | 2.79±0.18 | 2.69 |
| Housing units | 1,199±144 | 4,973 |
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 4159?
The median resident of Census Tract 4159 is 48.2 years old; 24.8% are under 18 and 20.5% are 65 or older. The largest group is non-Hispanic white residents at 57.5%, then Hispanic or Latino residents (of any race) at 13.1%. 12.3% of residents were born outside the United States.
| Measure | Tract 4159 | Mount Vernon |
|---|---|---|
| Median age | 48.2±2.4 | 44.2 |
| Under 18 years | 24.8%±4.9 pts | 24.3% |
| 65 years and over | 20.5%±5.0 pts | 18.6% |
| Hispanic or Latino (any race) | 13.1%±5.3 pts | 20.4% |
| White alone, not Hispanic | 57.5%±11.1 pts | 52.6% |
| Black or African American alone, not Hispanic | 10.5%±12.0 pts | 14.8% |
| Asian alone, not Hispanic | 6.4%±4.7 pts | 6.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.3 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.3 pts | 0.0% |
| Two or more races, not Hispanic | 9.7%±4.7 pts | 5.0% |
| Some other race alone, not Hispanic | 2.8%±2.6 pts | 1.0% |
| Born outside the United States | 12.3%±4.2 pts | 20.6% |
| Speak a language other than English at home (age 5+) | 15.5%±5.0 pts | 25.8% |
| Civilian veterans (age 18+) | 16.7%±4.8 pts | 12.4% |
| With a disability | 7.2%±3.1 pts | 9.0% |
| No health insurance coverage | 10.8%±12.2 pts | 8.7% |
| High school graduate or higher (age 25+) | 97.1%±1.8 pts | 96.7% |
| Bachelor's degree or higher (age 25+) | 66.3%±8.9 pts | 63.6% |
| Graduate or professional degree (age 25+) | 30.8%±6.4 pts | 32.8% |
| Lived in the same house a year earlier | 93.5%±3.9 pts | 88.5% |
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 4159 earn?
Half of the 1,113 households in Census Tract 4159 earn less than $184,821 a year (±$43,094), against $153,637 across Fairfax County: 96th highest of the county's 270 tracts with a reliable estimate.
| Measure | Tract 4159 | Mount Vernon |
|---|---|---|
| Median household income | $184,821±$43,094 | $163,750 |
| Mean household income | $245,859±$37,726 | $195,243 |
| Per capita income | $88,784±$13,681 | $73,480 |
| People below the poverty line | 2.0%±2.4 pts | 5.6% |
| Children under 18 below the poverty line | 0.0%±5.1 pts | 7.3% |
| Households receiving SNAP | 0.9%±1.3 pts | 5.3% |
| Households with a computer | 97.0%±2.6 pts | 95.4% |
| Households with a broadband subscription | 96.9%±2.6 pts | 94.7% |
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 4159?
Owners occupy 94.2% of Census Tract 4159's occupied homes and renters 5.8%. The median owner-occupied home is valued at $786,300 by its owner (±$59,800). The median renter pays $3,500 or more a month including utilities.
| Measure | Tract 4159 | Mount Vernon |
|---|---|---|
| Median home value (owner-occupied) | $786,300±$59,800 | $836,200 |
| Median gross rent | $3,500 or more | $1,620 |
| Renters paying 35% or more of income on rent | 15.4%±23.1 pts | 53.3% |
| Median monthly owner costs, with a mortgage | $3,236±$814 | $3,661 |
| Owner-occupied homes | 94.2%±3.7 pts | 73.5% |
| Renter-occupied homes | 5.8%±3.7 pts | 26.5% |
| Housing units | 1,199±144 | 4,973 |
| Single-family detached homes | 100.0%±3.3 pts | 74.3% |
| Mobile homes | 0.0%±3.3 pts | 2.5% |
| Built 2020 or later | 0.0%±3.3 pts | 0.7% |
| Built 2010 to 2019 | 0.8%±1.2 pts | 2.3% |
| Built 1939 or earlier | 1.2%±1.3 pts | 1.1% |
| Households with no vehicle | 0.0%±3.5 pts | 7.4% |
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 4159 get to work?
56.9% of Census Tract 4159's workers drive alone and 24.1% work from home. The average trip to work takes 26.0 minutes.
| Measure | Tract 4159 | Mount Vernon |
|---|---|---|
| In the labor force (age 16+) | 69.5%±5.5 pts | 72.4% |
| Unemployment rate | 2.1%±1.7 pts | 4.1% |
| Drove alone to work | 56.9%±7.2 pts | 56.6% |
| Carpooled | 12.2%±6.7 pts | 7.7% |
| Public transportation | 0.5%±0.8 pts | 3.0% |
| Walked | 0.5%±0.8 pts | 0.8% |
| Worked from home | 24.1%±7.1 pts | 29.4% |
| Mean travel time to work | 26.0 min±4.0 | 31.1 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 4159 compare with the other tracts in Fairfax County?
Among Fairfax County's tracts with a reliable estimate, Census Tract 4159 ranks as shown below (1 = highest).
| Measure | In Fairfax County | In Mount Vernon |
|---|---|---|
| Population | 199th of 271 | 3rd of 3 |
| Residents per square mile | 240th of 274 | 3rd of 3 |
| Median household income | 96th of 270 | 2nd of 3 |
| Per capita income | 61st of 271 | 1st of 3 |
| Median home value | 100th of 263 | 2nd of 3 |
| Median gross rent | 1st of 248 | 1st of 3 |
| Bachelor's degree or higher | 152nd of 270 | 2nd of 3 |
| Median age | 22nd of 271 | 1st of 3 |
| Owner-occupied share | 40th of 266 | 1st of 3 |
The tracts next to it on Fairfax County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4826.01 | 93rd | $185,582±$25,562 · within the margin of this tract |
| Tract 4154.02 | 94th | $185,481±$52,312 · within the margin of this tract |
| Tract 4161 | 95th | $184,861±$25,908 · within the margin of this tract |
| Tract 4159 | 96th | $184,821±$43,094 |
| Tract 4809.02 | 97th | $184,375±$29,967 · within the margin of this tract |
| Tract 4211.01 | 98th | $183,891±$14,913 · within the margin of this tract |
| Tract 4405.05 | 99th | $182,321±$16,045 · 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 4159?
3 of the 18 figures for Census Tract 4159 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