Census tract · Fairfax County
Census Tract 4309.01, Fairfax County, Virginia
Census Tract 4309.01, GEOID 51059430901, in Fairfax County, Virginia, entirely within West Springfield. 4,517 residents in the ACS 2020-2024 5-year estimates (±548); the 2020 Census counted 4,326.
Residents, 2020-2024
4,517
±548 (90% margin)
2020 Census count: 4,326
Median household income
$147,708
±$14,915 (90% margin)
Fairfax County: $153,637
Median home value
$644,800
±$29,528 (90% margin)
Fairfax County: $732,800
Median gross rent
$2,444
±$290 (90% margin)
Fairfax County: $2,276
Where is Census Tract 4309.01?
Census Tract 4309.01 is one of 274 census tracts in Fairfax County, Virginia. It covers 0.76 square miles of land, 5,715 residents per square mile in 2020. Its GEOID, 51059430901, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| West Springfield | 100% |
5 census tracts border Census Tract 4309.01: Tract 4308.01 ($205,682), Tract 4308.02 ($106,469), Tract 4309.02 ($171,250), Tract 4310.02 ($133,438) and Tract 4314 ($164,679). 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 4309.01?
The 2020-2024 American Community Survey puts Census Tract 4309.01's population at 4,517 (±548) in 1,374 households; the 2020 Census counted 4,326 residents and 1,426 housing units.
| Measure | Tract 4309.01 | West Springfield |
|---|---|---|
| Total population | 4,517±548 | 22,532 |
| Households | 1,374±157 | 7,553 |
| Average household size | 3.29±0.19 | 2.98 |
| Housing units | 1,397±150 | 7,833 |
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 4309.01?
The median resident of Census Tract 4309.01 is 37.4 years old; 26.0% are under 18 and 11.7% are 65 or older. The largest group is non-Hispanic white residents at 32.7%, then Hispanic or Latino residents (of any race) at 27.3%. 38.7% of residents were born outside the United States.
| Measure | Tract 4309.01 | West Springfield |
|---|---|---|
| Median age | 37.4±2.9 | 39.6 |
| Under 18 years | 26.0%±3.4 pts | 26.2% |
| 65 years and over | 11.7%±3.0 pts | 16.4% |
| Hispanic or Latino (any race) | 27.3%±10.0 pts | 17.4% |
| White alone, not Hispanic | 32.7%±8.4 pts | 47.4% |
| Black or African American alone, not Hispanic | 11.4%±6.2 pts | 11.0% |
| Asian alone, not Hispanic | 24.0%±7.7 pts | 17.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.3%±0.3 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.9 pts | 0.0% |
| Two or more races, not Hispanic | 4.3%±2.3 pts | 6.1% |
| Some other race alone, not Hispanic | 0.0%±0.9 pts | 0.5% |
| Born outside the United States | 38.7%±6.9 pts | 26.8% |
| Speak a language other than English at home (age 5+) | 53.6%±8.4 pts | 34.5% |
| Civilian veterans (age 18+) | 5.1%±2.2 pts | 9.3% |
| With a disability | 5.5%±2.4 pts | 9.1% |
| No health insurance coverage | 6.7%±3.6 pts | 3.6% |
| High school graduate or higher (age 25+) | 85.4%±5.4 pts | 93.8% |
| Bachelor's degree or higher (age 25+) | 48.7%±7.0 pts | 64.5% |
| Graduate or professional degree (age 25+) | 22.1%±4.9 pts | 30.7% |
| Lived in the same house a year earlier | 91.8%±4.0 pts | 90.3% |
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 4309.01 earn?
Half of the 1,374 households in Census Tract 4309.01 earn less than $147,708 a year (±$14,915), against $153,637 across Fairfax County: 154th highest of the county's 270 tracts with a reliable estimate.
| Measure | Tract 4309.01 | West Springfield |
|---|---|---|
| Median household income | $147,708±$14,915 | $163,115 |
| Mean household income | $174,245±$16,119 | $182,021 |
| Per capita income | $53,325±$5,042 | $61,944 |
| People below the poverty line | 1.7%±1.8 pts | 1.9% |
| Children under 18 below the poverty line | 0.0%±3.3 pts | 1.4% |
| Households receiving SNAP | 4.3%±3.7 pts | 3.2% |
| Households with a computer | 99.1%±1.1 pts | 98.6% |
| Households with a broadband subscription | 98.8%±1.1 pts | 97.8% |
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 4309.01?
Owners occupy 67.1% of Census Tract 4309.01's occupied homes and renters 32.9%. The median owner-occupied home is valued at $644,800 by its owner (±$29,528). The median renter pays $2,444 a month including utilities, and 36.6% of renters pay 35% or more of their income on rent.
| Measure | Tract 4309.01 | West Springfield |
|---|---|---|
| Median home value (owner-occupied) | $644,800±$29,528 | $637,300 |
| Median gross rent | $2,444±$290 | $2,455 |
| Renters paying 35% or more of income on rent | 36.6%±14.6 pts | 37.1% |
| Median monthly owner costs, with a mortgage | $3,042±$264 | $2,951 |
| Owner-occupied homes | 67.1%±8.3 pts | 84.9% |
| Renter-occupied homes | 32.9%±8.3 pts | 15.1% |
| Housing units | 1,397±150 | 7,833 |
| Single-family detached homes | 36.7%±7.5 pts | 45.6% |
| Mobile homes | 1.9%±2.6 pts | 0.5% |
| Built 2020 or later | 1.3%±1.8 pts | 0.2% |
| Built 2010 to 2019 | 0.0%±2.8 pts | 0.3% |
| Built 1939 or earlier | 0.0%±2.8 pts | 1.0% |
| Households with no vehicle | 5.6%±4.5 pts | 2.2% |
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 4309.01 get to work?
51.9% of Census Tract 4309.01's workers drive alone and 25.5% work from home. The average trip to work takes 26.4 minutes.
| Measure | Tract 4309.01 | West Springfield |
|---|---|---|
| In the labor force (age 16+) | 75.2%±4.4 pts | 70.9% |
| Unemployment rate | 1.0%±1.2 pts | 1.7% |
| Drove alone to work | 51.9%±8.9 pts | 54.7% |
| Carpooled | 15.4%±9.7 pts | 9.1% |
| Public transportation | 4.8%±3.0 pts | 7.8% |
| Walked | 2.0%±1.4 pts | 1.2% |
| Worked from home | 25.5%±7.4 pts | 26.1% |
| Mean travel time to work | 26.4 min±3.5 | 32.2 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 4309.01 compare with the other tracts in Fairfax County?
Among Fairfax County's tracts with a reliable estimate, Census Tract 4309.01 ranks as shown below (1 = highest).
| Measure | In Fairfax County | In West Springfield |
|---|---|---|
| Population | 106th of 271 | 2nd of 5 |
| Residents per square mile | 99th of 274 | 1st of 5 |
| Median household income | 154th of 270 | 4th of 5 |
| Per capita income | 213th of 271 | 5th of 5 |
| Median home value | 157th of 263 | 2nd of 5 |
| Median gross rent | 127th of 248 | 4th of 5 |
| Bachelor's degree or higher | 234th of 270 | 5th of 5 |
| Median age | 189th of 271 | 4th of 5 |
| Owner-occupied share | 173rd of 266 | 5th of 5 |
The tracts next to it on Fairfax County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4406 | 151st | $148,919±$8,574 · within the margin of this tract |
| 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 |
| Tract 4155 | 155th | $146,989±$48,028 · within the margin of this tract |
| 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 4309.01?
1 of the 18 figures for Census Tract 4309.01 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