Census tract · Los Angeles County
Census Tract 4004.03, Los Angeles County, California
Census Tract 4004.03, GEOID 06037400403, in Los Angeles County, California, mostly within San Dimas (94% of its census blocks). 4,222 residents in the ACS 2020-2024 5-year estimates (±773); the 2020 Census counted 3,993.
Residents, 2020-2024
4,222
±773 (90% margin)
2020 Census count: 3,993
Median household income
$128,750
±$27,301 (90% margin)
Los Angeles County: $90,112
Median home value
$850,200
±$57,057 (90% margin)
Los Angeles County: $834,200
Median gross rent
$2,364
±$336 (90% margin)
Los Angeles County: $1,954
Where is Census Tract 4004.03?
Census Tract 4004.03 is one of 2,498 census tracts in Los Angeles County, California. It covers 5.07 square miles of land, 788 residents per square mile in 2020. Its GEOID, 06037400403, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| San Dimas | 94% |
7 census tracts border Census Tract 4004.03: Tract 4002.07 ($149,052), Tract 4003.04 ($84,457), Tract 4004.02 ($154,707), Tract 4004.04 ($185,088), Tract 4013.11 ($92,885), Tract 4089 ($84,583) and Tract 9304 ($99,750). 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 4004.03?
The 2020-2024 American Community Survey puts Census Tract 4004.03's population at 4,222 (±773) in 1,409 households; the 2020 Census counted 3,993 residents and 1,451 housing units.
| Measure | Tract 4004.03 | San Dimas |
|---|---|---|
| Total population | 4,222±773 | 33,789 |
| Households | 1,409±216 | 12,071 |
| Average household size | 2.96±0.44 | 2.75 |
| Housing units | 1,409±216 | 12,370 |
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 4004.03?
The median resident of Census Tract 4004.03 is 41.5 years old; 25.0% are under 18 and 17.6% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 43.8%, then non-Hispanic white residents at 34.7%. 10.7% of residents were born outside the United States.
| Measure | Tract 4004.03 | San Dimas |
|---|---|---|
| Median age | 41.5±7.0 | 43.3 |
| Under 18 years | 25.0%±4.7 pts | 20.1% |
| 65 years and over | 17.6%±2.8 pts | 20.3% |
| Hispanic or Latino (any race) | 43.8%±6.6 pts | 40.9% |
| White alone, not Hispanic | 34.7%±7.2 pts | 33.7% |
| Black or African American alone, not Hispanic | 5.2%±3.9 pts | 3.4% |
| Asian alone, not Hispanic | 9.2%±3.4 pts | 16.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.0 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.0 pts | 0.3% |
| Two or more races, not Hispanic | 7.1%±6.0 pts | 4.9% |
| Some other race alone, not Hispanic | 0.0%±1.0 pts | 0.4% |
| Born outside the United States | 10.7%±3.7 pts | 21.5% |
| Speak a language other than English at home (age 5+) | 25.7%±5.3 pts | 37.3% |
| Civilian veterans (age 18+) | 3.9%±2.4 pts | 4.3% |
| With a disability | 13.7%±3.3 pts | 14.2% |
| No health insurance coverage | 8.4%±4.7 pts | 5.6% |
| High school graduate or higher (age 25+) | 90.7%±5.1 pts | 92.7% |
| Bachelor's degree or higher (age 25+) | 39.5%±7.2 pts | 40.4% |
| Graduate or professional degree (age 25+) | 19.6%±4.8 pts | 17.7% |
| Lived in the same house a year earlier | 93.1%±4.0 pts | 93.2% |
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 4004.03 earn?
Half of the 1,409 households in Census Tract 4004.03 earn less than $128,750 a year (±$27,301), against $90,112 across Los Angeles County: 406th highest of the county's 2,422 tracts with a reliable estimate.
| Measure | Tract 4004.03 | San Dimas |
|---|---|---|
| Median household income | $128,750±$27,301 | $105,321 |
| Mean household income | $152,464±$20,653 | $140,783 |
| Per capita income | $51,394±$6,890 | $51,207 |
| People below the poverty line | 10.4%±8.7 pts | 9.9% |
| Children under 18 below the poverty line | 16.9%±21.3 pts | 13.9% |
| Households receiving SNAP | 7.0%±5.3 pts | 6.8% |
| Households with a computer | 97.9%±2.8 pts | 96.8% |
| Households with a broadband subscription | 93.2%±4.0 pts | 92.7% |
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 4004.03?
Owners occupy 67.7% of Census Tract 4004.03's occupied homes and renters 32.3%. The median owner-occupied home is valued at $850,200 by its owner (±$57,057). The median renter pays $2,364 a month including utilities, and 61.7% of renters pay 35% or more of their income on rent.
| Measure | Tract 4004.03 | San Dimas |
|---|---|---|
| Median home value (owner-occupied) | $850,200±$57,057 | $801,800 |
| Median gross rent | $2,364±$336 | $2,278 |
| Renters paying 35% or more of income on rent | 61.7%±25.5 pts | 56.9% |
| Median monthly owner costs, with a mortgage | $3,258±$440 | $3,181 |
| Owner-occupied homes | 67.7%±8.2 pts | 72.4% |
| Renter-occupied homes | 32.3%±8.2 pts | 27.6% |
| Housing units | 1,409±216 | 12,370 |
| Single-family detached homes | 59.3%±7.6 pts | 61.6% |
| Mobile homes | 0.0%±3.0 pts | 8.6% |
| Built 2020 or later | 0.0%±3.0 pts | 0.8% |
| Built 2010 to 2019 | 0.9%±1.4 pts | 3.3% |
| Built 1939 or earlier | 0.0%±3.0 pts | 5.3% |
| Households with no vehicle | 0.9%±1.2 pts | 3.3% |
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 4004.03 get to work?
77.4% of Census Tract 4004.03's workers drive alone and 14.9% work from home. The average trip to work takes 34.3 minutes.
| Measure | Tract 4004.03 | San Dimas |
|---|---|---|
| In the labor force (age 16+) | 61.2%±7.4 pts | 63.1% |
| Unemployment rate | 0.9%±1.6 pts | 4.6% |
| Drove alone to work | 77.4%±5.7 pts | 72.0% |
| Carpooled | 5.9%±4.0 pts | 9.1% |
| Public transportation | 1.1%±0.8 pts | 0.4% |
| Walked | 0.0%±2.2 pts | 0.5% |
| Worked from home | 14.9%±5.6 pts | 16.8% |
| Mean travel time to work | 34.3 min±4.8 | 31.6 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 4004.03 compare with the other tracts in Los Angeles County?
Among Los Angeles County's tracts with a reliable estimate, Census Tract 4004.03 ranks as shown below (1 = highest).
| Measure | In Los Angeles County | In San Dimas |
|---|---|---|
| Population | 978th of 2,470 | 5th of 6 |
| Residents per square mile | 2,403rd of 2,495 | 6th of 6 |
| Median household income | 406th of 2,422 | 3rd of 6 |
| Per capita income | 795th of 2,468 | 3rd of 6 |
| Median home value | 950th of 2,319 | 3rd of 6 |
| Median gross rent | 647th of 2,396 | 4th of 6 |
| Bachelor's degree or higher | 977th of 2,410 | 4th of 6 |
| Median age | 786th of 2,473 | 4th of 6 |
| Owner-occupied share | 673rd of 2,272 | 4th of 6 |
The tracts next to it on Los Angeles County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4074 | 403rd | $128,933±$15,789 · within the margin of this tract |
| Tract 1352.02 | 404th | $128,816±$24,606 · within the margin of this tract |
| Tract 1945 | 404th | $128,816±$53,927 · within the margin of this tract |
| Tract 2671.02 | 406th | $128,750±$54,765 · within the margin of this tract |
| Tract 4004.03 | 406th | $128,750±$27,301 |
| Tract 2723.01 | 408th | $128,655±$12,868 · within the margin of this tract |
| Tract 4034.09 | 409th | $128,654±$30,386 · 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 4004.03?
2 of the 18 figures for Census Tract 4004.03 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