Census tract · Fairfax County
Census Tract 4520, Fairfax County, Virginia
Census Tract 4520, GEOID 51059452000, in Fairfax County, Virginia, entirely within Annandale. 2,928 residents in the ACS 2020-2024 5-year estimates (±443); the 2020 Census counted 3,061.
Residents, 2020-2024
2,928
±443 (90% margin)
2020 Census count: 3,061
Median household income
$157,212
±$61,053 (90% margin)
Fairfax County: $153,637
Median home value
$737,000
±$69,802 (90% margin)
Fairfax County: $732,800
Median gross rent
$293
±$92 (90% margin)
Fairfax County: $2,276
Where is Census Tract 4520?
Census Tract 4520 is one of 274 census tracts in Fairfax County, Virginia. It covers 0.91 square miles of land, 3,364 residents per square mile in 2020. Its GEOID, 51059452000, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Annandale | 100% |
7 census tracts border Census Tract 4520: Tract 4508 ($129,583), Tract 4510 ($175,625), Tract 4511 ($195,556), Tract 4518 ($154,083), Tract 4519 ($104,655), Tract 4521.01 ($152,321) and Tract 4521.02 ($123,611). 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 4520?
The 2020-2024 American Community Survey puts Census Tract 4520's population at 2,928 (±443) in 1,003 households; the 2020 Census counted 3,061 residents and 935 housing units.
| Measure | Tract 4520 | Annandale |
|---|---|---|
| Total population | 2,928±443 | 41,705 |
| Households | 1,003±81 | 13,891 |
| Average household size | 2.85±0.34 | 2.95 |
| Housing units | 1,062±84 | 14,474 |
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 4520?
The median resident of Census Tract 4520 is 45.1 years old; 25.1% are under 18 and 19.2% are 65 or older. The largest group is non-Hispanic white residents at 40.2%, then non-Hispanic Asian residents at 26.0%. 48.0% of residents were born outside the United States.
| Measure | Tract 4520 | Annandale |
|---|---|---|
| Median age | 45.1±3.4 | 41.4 |
| Under 18 years | 25.1%±5.3 pts | 22.1% |
| 65 years and over | 19.2%±5.0 pts | 17.1% |
| Hispanic or Latino (any race) | 19.2%±17.1 pts | 31.8% |
| White alone, not Hispanic | 40.2%±11.4 pts | 31.2% |
| Black or African American alone, not Hispanic | 11.1%±9.3 pts | 8.2% |
| Asian alone, not Hispanic | 26.0%±6.8 pts | 23.6% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.4 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.4 pts | 0.0% |
| Two or more races, not Hispanic | 3.6%±3.1 pts | 3.9% |
| Some other race alone, not Hispanic | 0.0%±1.4 pts | 1.2% |
| Born outside the United States | 48.0%±11.4 pts | 42.5% |
| Speak a language other than English at home (age 5+) | 54.6%±12.7 pts | 55.2% |
| Civilian veterans (age 18+) | 7.2%±5.0 pts | 5.0% |
| With a disability | 13.5%±4.8 pts | 10.2% |
| No health insurance coverage | 3.3%±2.3 pts | 15.2% |
| High school graduate or higher (age 25+) | 86.7%±5.2 pts | 83.4% |
| Bachelor's degree or higher (age 25+) | 54.6%±7.1 pts | 45.6% |
| Graduate or professional degree (age 25+) | 31.3%±6.2 pts | 19.1% |
| Lived in the same house a year earlier | 96.2%±3.3 pts | 86.8% |
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 4520 earn?
Half of the 1,003 households in Census Tract 4520 earn less than $157,212 a year (±$61,053), against $153,637 across Fairfax County: 136th highest of the county's 270 tracts with a reliable estimate. 9.1% of residents live below the poverty line.
| Measure | Tract 4520 | Annandale |
|---|---|---|
| Median household income | $157,212±$61,053 | $116,263 |
| Mean household income | $207,865±$44,217 | $157,958 |
| Per capita income | $73,993±$17,710 | $54,011 |
| People below the poverty line | 9.1%±3.2 pts | 12.1% |
| Children under 18 below the poverty line | 0.0%±5.3 pts | 17.9% |
| Households receiving SNAP | 14.9%±8.0 pts | 10.6% |
| Households with a computer | 87.0%±7.0 pts | 97.0% |
| Households with a broadband subscription | 82.0%±9.5 pts | 93.5% |
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 4520?
Owners occupy 72.8% of Census Tract 4520's occupied homes and renters 27.2%. The median owner-occupied home is valued at $737,000 by its owner (±$69,802). The median renter pays $293 a month including utilities.
| Measure | Tract 4520 | Annandale |
|---|---|---|
| Median home value (owner-occupied) | $737,000±$69,802 | $681,300 |
| Median gross rent | $293±$92 | $1,933 |
| Renters paying 35% or more of income on rent | 23.4%±19.7 pts | 48.3% |
| Median monthly owner costs, with a mortgage | $3,221±$452 | $2,964 |
| Owner-occupied homes | 72.8%±9.4 pts | 65.4% |
| Renter-occupied homes | 27.2%±9.4 pts | 34.6% |
| Housing units | 1,062±84 | 14,474 |
| Single-family detached homes | 51.4%±10.0 pts | 47.0% |
| Mobile homes | 0.0%±3.7 pts | 0.4% |
| Built 2020 or later | 0.0%±3.7 pts | 0.7% |
| Built 2010 to 2019 | 0.8%±1.5 pts | 2.0% |
| Built 1939 or earlier | 4.2%±3.4 pts | 0.7% |
| Households with no vehicle | 19.2%±9.4 pts | 11.1% |
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 4520 get to work?
62.0% of Census Tract 4520's workers drive alone and 24.8% work from home. The average trip to work takes 26.2 minutes.
| Measure | Tract 4520 | Annandale |
|---|---|---|
| In the labor force (age 16+) | 67.2%±6.2 pts | 68.6% |
| Unemployment rate | 9.1%±7.5 pts | 4.9% |
| Drove alone to work | 62.0%±8.2 pts | 56.7% |
| Carpooled | 9.0%±6.0 pts | 14.8% |
| Public transportation | 1.3%±1.6 pts | 4.8% |
| Walked | 2.9%±3.3 pts | 2.2% |
| Worked from home | 24.8%±7.9 pts | 19.7% |
| Mean travel time to work | 26.2 min±2.9 | 27.3 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 4520 compare with the other tracts in Fairfax County?
Among Fairfax County's tracts with a reliable estimate, Census Tract 4520 ranks as shown below (1 = highest).
| Measure | In Fairfax County | In Annandale |
|---|---|---|
| Population | 215th of 271 | 8th of 10 |
| Residents per square mile | 196th of 274 | 10th of 10 |
| Median household income | 136th of 270 | 3rd of 10 |
| Per capita income | 115th of 271 | 1st of 10 |
| Median home value | 115th of 263 | 4th of 10 |
| Median gross rent | 248th of 248 | 9th of 9 |
| Poverty rate | 28th of 70 | 4th of 6 |
| Bachelor's degree or higher | 211th of 270 | 4th of 10 |
| Median age | 50th of 271 | 4th of 10 |
| Owner-occupied share | 159th of 266 | 5th of 10 |
The tracts next to it on Fairfax County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4210.01 | 133rd | $159,000±$41,954 · within the margin of this tract |
| Tract 4405.03 | 134th | $158,194±$72,310 · within the margin of this tract |
| Tract 4822.03 | 135th | $157,500±$32,303 · within the margin of this tract |
| Tract 4520 | 136th | $157,212±$61,053 |
| Tract 4712.04 | 137th | $156,518±$46,049 · within the margin of this tract |
| Tract 4223.01 | 138th | $156,107±$38,665 · within the margin of this tract |
| Tract 4503 | 139th | $155,547±$25,843 · 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 4520?
2 of the 18 figures for Census Tract 4520 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