PlainCities

Census tract · Fairfax County

Census Tract 4817.01, Fairfax County, Virginia

Census Tract 4817.01, GEOID 51059481701, in Fairfax County, Virginia, entirely within Difficult Run. 5,838 residents in the ACS 2020-2024 5-year estimates (±670); the 2020 Census counted 6,196.

Residents, 2020-2024

5,838

±670 (90% margin)
2020 Census count: 6,196

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

$1,045,000

±$74,868 (90% margin)
Fairfax County: $732,800

Median gross rent

not published


Fairfax County: $2,276

Where is Census Tract 4817.01?

Census Tract 4817.01 is one of 274 census tracts in Fairfax County, Virginia. It covers 4.03 square miles of land, 1,536 residents per square mile in 2020. Its GEOID, 51059481701, names it uniquely (how tract numbers and GEOIDs work).

Places Census Tract 4817.01 lies in (share of its 2020 census blocks)
PlaceShare of the tract
Difficult Run100%
Census Tract 4817.01 (marked with a dot) in Fairfax County, Virginia. Boundaries: Census Bureau 2024.
4811.064814481548164817.024825.044826.034826.04 4817.01 1 mi
Census Tract 4817.01 (shaded) and the tracts that border it, numbered. Boundaries: Census Bureau 2024 cartographic boundary file, 1:500,000.

8 census tracts border Census Tract 4817.01: Tract 4811.06 ($234,892), Tract 4814 ($172,099), Tract 4815 ($250,000 or more), Tract 4816 ($250,000 or more), Tract 4817.02 ($145,563), Tract 4825.04 ($250,000 or more), Tract 4826.03 ($162,200) and Tract 4826.04 ($250,000 or more). 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 4817.01?

The 2020-2024 American Community Survey puts Census Tract 4817.01's population at 5,838 (±670) in 1,759 households; the 2020 Census counted 6,196 residents and 2,038 housing units.

Counts, ACS 2020-2024 5-year estimates
Measure Tract 4817.01Difficult RunFairfax CountyVirginia
Total population 5,838 ±670 9,938 1,147,837 8,705,170
Households 1,759 ±151 3,139 414,101 3,365,732
Average household size 3.32 ±0.25 3.17 2.75 2.52
Housing units 1,925 ±172 3,356 430,047 3,684,756

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 4817.01?

The median resident of Census Tract 4817.01 is 45.8 years old; 27.6% are under 18 and 18.8% are 65 or older. The largest group is non-Hispanic white residents at 63.4%, then non-Hispanic Asian residents at 22.1%. 19.0% 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.
Measure Tract 4817.01Difficult RunFairfax CountyVirginia
Median age 45.8 ±2.7 45.3 39.1 39.0
Under 18 years 27.6% ±3.8 pts 26.8% 22.9% 21.7%
65 years and over 18.8% ±2.8 pts 18.2% 15.0% 16.7%
Hispanic or Latino (any race) 5.0% ±2.8 pts 5.1% 17.6% 11.0%
White alone, not Hispanic 63.4% ±6.7 pts 69.2% 46.8% 58.4%
Black or African American alone, not Hispanic 1.4% ±1.7 pts 1.0% 9.4% 18.3%
Asian alone, not Hispanic 22.1% ±6.1 pts 16.5% 19.9% 6.9%
American Indian and Alaska Native alone, not Hispanic 0.0% ±0.7 pts 0.0% 0.1% 0.1%
Native Hawaiian and Other Pacific Islander alone, not Hispanic 0.0% ±0.7 pts 0.0% 0.0% 0.1%
Two or more races, not Hispanic 5.7% ±3.2 pts 6.1% 5.4% 4.7%
Some other race alone, not Hispanic 2.4% ±2.8 pts 2.1% 0.8% 0.6%
Born outside the United States 19.0% ±4.1 pts 17.2% 30.8% 13.1%
Speak a language other than English at home (age 5+) 23.7% ±6.0 pts 20.0% 39.0% 17.4%
Civilian veterans (age 18+) 7.8% ±3.5 pts 7.8% 7.5% 9.4%
With a disability 7.4% ±3.5 pts 6.1% 8.0% 12.5%
No health insurance coverage 0.2% ±0.3 pts 0.3% 7.1% 6.9%
High school graduate or higher (age 25+) 99.1% ±1.0 pts 99.4% 93.2% 91.6%
Bachelor's degree or higher (age 25+) 84.7% ±4.4 pts 85.5% 65.0% 42.2%
Graduate or professional degree (age 25+) 45.8% ±7.2 pts 48.3% 33.0% 18.5%
Lived in the same house a year earlier 95.1% ±3.4 pts 92.6% 87.0% 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 4817.01 earn?

Half of the 1,759 households in Census Tract 4817.01 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.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure Tract 4817.01Difficult RunFairfax CountyVirginia
Median household income $250,000 or more $250,000 or more $153,637 $93,170
Mean household income $354,707 ±$41,020 $356,124 $195,941 $128,260
Per capita income $107,993 ±$14,242 $113,631 $71,828 $50,666
People below the poverty line 0.0% ±0.7 pts 1.4% 5.9% 9.9%
Children under 18 below the poverty line 0.0% ±2.5 pts 2.6% 7.2% 12.3%
Households receiving SNAP 1.9% ±2.2 pts 1.4% 4.3% 9.1%
Households with a computer 99.1% ±1.3 pts 99.1% 98.4% 95.4%
Households with a broadband subscription 99.1% ±1.3 pts 99.3% 96.4% 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 4817.01?

Owners occupy 98.3% of Census Tract 4817.01's occupied homes and renters 1.7%. The median owner-occupied home is valued at $1,045,000 by its owner (±$74,868).

Housing, ACS 2020-2024 5-year estimates
Measure Tract 4817.01Difficult RunFairfax CountyVirginia
Median home value (owner-occupied) $1,045,000 ±$74,868 $1,111,400 $732,800 $383,700
Renters paying 35% or more of income on rent 0.0% ±60.1 pts 17.0% 36.3% 39.4%
Median monthly owner costs, with a mortgage $4,000 or more $4,000 or more $3,227 $2,127
Owner-occupied homes 98.3% ±2.0 pts 97.7% 68.6% 67.3%
Renter-occupied homes 1.7% ±2.0 pts 2.3% 31.4% 32.7%
Housing units 1,925 ±172 3,356 430,047 3,684,756
Single-family detached homes 100.0% ±2.1 pts 99.7% 45.5% 61.3%
Mobile homes 0.0% ±2.1 pts 0.0% 0.5% 4.3%
Built 2020 or later 0.0% ±2.1 pts 0.2% 1.3% 1.7%
Built 2010 to 2019 2.8% ±2.5 pts 3.4% 7.2% 9.9%
Built 1939 or earlier 0.9% ±1.4 pts 1.7% 1.1% 7.0%
Households with no vehicle 0.0% ±2.2 pts 0.0% 4.8% 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 4817.01 get to work?

52.6% of Census Tract 4817.01's workers drive alone and 37.7% work from home. The average trip to work takes 28.5 minutes.

Work and commuting, ACS 2020-2024 5-year estimates
Measure Tract 4817.01Difficult RunFairfax CountyVirginia
In the labor force (age 16+) 64.1% ±5.2 pts 65.0% 70.8% 65.4%
Unemployment rate 0.0% ±1.4 pts 1.9% 4.2% 4.3%
Drove alone to work 52.6% ±9.1 pts 53.3% 55.4% 67.6%
Carpooled 6.1% ±4.6 pts 4.5% 7.7% 8.0%
Public transportation 1.2% ±1.4 pts 2.8% 4.7% 2.3%
Walked 0.6% ±0.9 pts 0.5% 1.7% 2.1%
Worked from home 37.7% ±9.1 pts 37.2% 28.7% 18.3%
Mean travel time to work 28.5 min ±3.5 30.1 min 28.9 min 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 4817.01 compare with the other tracts in Fairfax County?

Among Fairfax County's tracts with a reliable estimate, Census Tract 4817.01 ranks as shown below (1 = highest).

Census Tract 4817.01's rank among the tracts of Fairfax County
MeasureIn Fairfax County
Population54th of 271
Residents per square mile246th of 274
Median household income1st of 270
Per capita income23rd of 271
Median home value29th of 263
Bachelor's degree or higher15th of 270
Median age42nd of 271
Owner-occupied share12th 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 4817.01?

2 of the 17 figures for Census Tract 4817.01 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