PlainCities

Census tract · Fairfax County

Census Tract 4925, Fairfax County, Virginia

Census Tract 4925, GEOID 51059492500, in Fairfax County, Virginia, partly within Union Mill and Clifton. 3,962 residents in the ACS 2020-2024 5-year estimates (±321); the 2020 Census counted 4,139.

Residents, 2020-2024

3,962

±321 (90% margin)
2020 Census count: 4,139

Median household income

$250,000 or more

The survey's top or bottom value; no margin is published
Fairfax County: $153,637

Median home value

$1,110,400

±$46,368 (90% margin)
Fairfax County: $732,800

Median gross rent

$2,223

±$94 (90% margin)
Fairfax County: $2,276

Where is Census Tract 4925?

Census Tract 4925 is one of 274 census tracts in Fairfax County, Virginia. It covers 16.82 square miles of land, 246 residents per square mile in 2020. Its GEOID, 51059492500, names it uniquely (how tract numbers and GEOIDs work).

Places Census Tract 4925 lies in (share of its 2020 census blocks)
PlaceShare of the tract
Union Mill39%
Clifton15%
Census Tract 4925 (marked with a dot) in Fairfax County, Virginia. Boundaries: Census Bureau 2024.
4905.024913.01492049219012.199012.319019 4925 2 mi
Census Tract 4925 (shaded) and the tracts that border it, numbered. Boundaries: Census Bureau 2024 cartographic boundary file, 1:500,000. Dashed: tracts outside Fairfax County.

11 census tracts border Census Tract 4925: Tract 4905.01 ($111,721), Tract 4905.02 ($210,197), Tract 4913.01 ($200,865), Tract 4914.03 ($247,583), Tract 4914.04 ($170,731), Tract 4914.05 ($250,000 or more), Tract 4920 ($250,000 or more), Tract 4921 ($250,000 or more), Tract 9012.19 in Prince William County ($221,964), Tract 9012.31 in Prince William County ($180,647) and Tract 9019 in Prince William County ($109,671). 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 4925?

The 2020-2024 American Community Survey puts Census Tract 4925's population at 3,962 (±321) in 1,414 households; the 2020 Census counted 4,139 residents and 1,453 housing units.

Counts, ACS 2020-2024 5-year estimates
MeasureTract 4925Fairfax CountyVirginia
Total population3,962±3211,147,8378,705,170
Households1,414±116414,1013,365,732
Average household size2.80±0.242.752.52
Housing units1,446±120430,0473,684,756

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 4925?

The median resident of Census Tract 4925 is 53.1 years old; 21.5% are under 18 and 28.4% are 65 or older. The largest group is non-Hispanic white residents at 72.1%, then non-Hispanic Asian residents at 15.1%. 14.3% of residents were born outside the United States.

Age, origin, education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
MeasureTract 4925Fairfax CountyVirginia
Median age53.1±3.039.139.0
Under 18 years21.5%±2.9 pts22.9%21.7%
65 years and over28.4%±5.8 pts15.0%16.7%
Hispanic or Latino (any race)6.6%±3.3 pts17.6%11.0%
White alone, not Hispanic72.1%±6.1 pts46.8%58.4%
Black or African American alone, not Hispanic1.1%±1.3 pts9.4%18.3%
Asian alone, not Hispanic15.1%±4.5 pts19.9%6.9%
American Indian and Alaska Native alone, not Hispanic0.0%±1.0 pts0.1%0.1%
Native Hawaiian and Other Pacific Islander alone, not Hispanic0.0%±1.0 pts0.0%0.1%
Two or more races, not Hispanic4.6%±3.7 pts5.4%4.7%
Some other race alone, not Hispanic0.5%±0.6 pts0.8%0.6%
Born outside the United States14.3%±2.8 pts30.8%13.1%
Speak a language other than English at home (age 5+)17.2%±3.9 pts39.0%17.4%
Civilian veterans (age 18+)8.8%±2.3 pts7.5%9.4%
With a disability11.0%±3.1 pts8.0%12.5%
No health insurance coverage3.3%±1.9 pts7.1%6.9%
High school graduate or higher (age 25+)98.5%±1.0 pts93.2%91.6%
Bachelor's degree or higher (age 25+)76.3%±4.2 pts65.0%42.2%
Graduate or professional degree (age 25+)31.0%±5.7 pts33.0%18.5%
Lived in the same house a year earlier96.1%±2.9 pts87.0%86.9%

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 4925 earn?

Half of the 1,414 households in Census Tract 4925 earn less than $250,000 or more a year (), against $153,637 across Fairfax County: 1st highest of the county's 270 tracts with a reliable estimate. 3.5% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
MeasureTract 4925Fairfax CountyVirginia
Median household income$250,000 or more$153,637$93,170
Mean household income$336,600±$45,366$195,941$128,260
Per capita income$120,070±$14,510$71,828$50,666
People below the poverty line3.5%±2.1 pts5.9%9.9%
Children under 18 below the poverty line2.0%±3.0 pts7.2%12.3%
Households receiving SNAP0.6%±0.9 pts4.3%9.1%
Households with a computer99.4%±0.8 pts98.4%95.4%
Households with a broadband subscription98.2%±1.8 pts96.4%91.0%

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 4925?

Owners occupy 91.4% of Census Tract 4925's occupied homes and renters 8.6%. The median owner-occupied home is valued at $1,110,400 by its owner (±$46,368). The median renter pays $2,223 a month including utilities.

Housing, ACS 2020-2024 5-year estimates
MeasureTract 4925Fairfax CountyVirginia
Median home value (owner-occupied)$1,110,400±$46,368$732,800$383,700
Median gross rent$2,223±$94$2,276$1,579
Renters paying 35% or more of income on rent9.6%±25.7 pts36.3%39.4%
Median monthly owner costs, with a mortgage$4,000 or more$3,227$2,127
Owner-occupied homes91.4%±9.1 pts68.6%67.3%
Renter-occupied homes8.6%±9.1 pts31.4%32.7%
Housing units1,446±120430,0473,684,756
Single-family detached homes98.1%±2.8 pts45.5%61.3%
Mobile homes0.0%±2.7 pts0.5%4.3%
Built 2020 or later0.1%±0.2 pts1.3%1.7%
Built 2010 to 20193.9%±2.9 pts7.2%9.9%
Built 1939 or earlier7.7%±3.2 pts1.1%7.0%
Households with no vehicle0.5%±0.8 pts4.8%6.1%

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 4925 get to work?

63.0% of Census Tract 4925's workers drive alone and 31.3% work from home. The average trip to work takes 37.5 minutes. The unemployment rate in 2020-2024 averaged 6.4%.

Work and commuting, ACS 2020-2024 5-year estimates
MeasureTract 4925Fairfax CountyVirginia
In the labor force (age 16+)56.5%±5.4 pts70.8%65.4%
Unemployment rate6.4%±3.4 pts4.2%4.3%
Drove alone to work63.0%±6.9 pts55.4%67.6%
Carpooled2.6%±1.7 pts7.7%8.0%
Public transportation0.6%±0.9 pts4.7%2.3%
Walked1.8%±1.9 pts1.7%2.1%
Worked from home31.3%±6.6 pts28.7%18.3%
Mean travel time to work37.5 min±4.728.9 min27.3 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 4925 compare with the other tracts in Fairfax County?

Among Fairfax County's tracts with a reliable estimate, Census Tract 4925 ranks as shown below (1 = highest).

Census Tract 4925's rank among the tracts of Fairfax County
MeasureIn Fairfax County
Population136th of 271
Residents per square mile270th of 274
Median household income1st of 270
Per capita income17th of 271
Median home value22nd of 263
Median gross rent179th of 248
Poverty rate59th of 70
Bachelor's degree or higher79th of 270
Median age6th of 271
Owner-occupied share63rd of 266

The tracts next to it on Fairfax County's income ladder

Median household income, ACS 2020-2024 5-year estimates
TractRankMedian household incomeResidents
Tract 41561st$250,000 or more2,585
Tract 46021st$250,000 or more3,955
Tract 46031st$250,000 or more2,865
Tract 4607.021st$250,000 or more4,881
Tract 46101st$250,000 or more2,499
Tract 4612.011st$250,000 or more3,954
Tract 47011st$250,000 or more2,641
Tract 47031st$250,000 or more3,293
Tract 47041st$250,000 or more5,136
Tract 47071st$250,000 or more5,302
Tract 4713.041st$250,000 or more2,216
Tract 48011st$250,000 or more4,149
Tract 4802.011st$250,000 or more4,520
Tract 4803.011st$250,000 or more2,984
Tract 4803.021st$250,000 or more4,508
Tract 4804.011st$250,000 or more4,617
Tract 4804.021st$250,000 or more5,531
Tract 4805.011st$250,000 or more3,097
Tract 4811.051st$250,000 or more4,644
Tract 48151st$250,000 or more2,389
Tract 48161st$250,000 or more3,347
Tract 4817.011st$250,000 or more5,838
Tract 48241st$250,000 or more2,179
Tract 4825.041st$250,000 or more4,614
Tract 4826.041st$250,000 or more3,886
Tract 49101st$250,000 or more2,124
Tract 4914.051st$250,000 or more2,462
Tract 4915.021st$250,000 or more6,458
Tract 49201st$250,000 or more6,583
Tract 49211st$250,000 or more6,985
Tract 4922.011st$250,000 or more2,891
Tract 4922.021st$250,000 or more6,797
Tract 4922.031st$250,000 or more3,690
Tract 49251st$250,000 or more3,962

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 4925?

1 of the 18 figures for Census Tract 4925 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