Census tract · Contra Costa County
Census Tract 3500, Contra Costa County, California
Census Tract 3500, GEOID 06013350000, in Contra Costa County, California, mostly within Lafayette (57% of its census blocks). 5,826 residents in the ACS 2020-2024 5-year estimates (±715); the 2020 Census counted 6,224.
Residents, 2020-2024
5,826
±715 (90% margin)
2020 Census count: 6,224
Median household income
$192,961
±$25,700 (90% margin)
Contra Costa County: $127,229
Median home value
$1,620,600
±$104,938 (90% margin)
Contra Costa County: $866,800
Median gross rent
$2,837
±$294 (90% margin)
Contra Costa County: $2,375
Where is Census Tract 3500?
Census Tract 3500 is one of 242 census tracts in Contra Costa County, California. It covers 3.31 square miles of land, 1,879 residents per square mile in 2020. Its GEOID, 06013350000, names it uniquely (how tract numbers and GEOIDs work).
7 census tracts border Census Tract 3500: Tract 3480 ($250,000 or more), Tract 3490 ($150,719), Tract 3512 ($250,000 or more), Tract 3521.01 ($223,281), Tract 3522.01 ($182,760), Tract 3530.01 ($250,000 or more) and Tract 3530.02 ($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 3500?
The 2020-2024 American Community Survey puts Census Tract 3500's population at 5,826 (±715) in 2,376 households; the 2020 Census counted 6,224 residents and 2,708 housing units.
| Measure | Tract 3500 | Lafayette |
|---|---|---|
| Total population | 5,826 ±715 | 25,285 |
| Households | 2,376 ±263 | 9,623 |
| Average household size | 2.45 ±0.20 | 2.62 |
| Housing units | 2,592 ±253 | 9,998 |
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 3500?
The median resident of Census Tract 3500 is 43.1 years old; 20.5% are under 18 and 23.5% are 65 or older. The largest group is non-Hispanic white residents at 64.3%, then non-Hispanic Asian residents at 14.3%. 22.7% of residents were born outside the United States.
| Measure | Tract 3500 | Lafayette |
|---|---|---|
| Median age | 43.1 ±2.2 | 45.7 |
| Under 18 years | 20.5% ±3.7 pts | 25.7% |
| 65 years and over | 23.5% ±4.3 pts | 21.3% |
| Hispanic or Latino (any race) | 12.6% ±6.6 pts | 8.0% |
| White alone, not Hispanic | 64.3% ±8.6 pts | 71.8% |
| Black or African American alone, not Hispanic | 1.3% ±1.7 pts | 0.8% |
| Asian alone, not Hispanic | 14.3% ±2.5 pts | 10.1% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.1% |
| Two or more races, not Hispanic | 7.5% ±3.9 pts | 9.0% |
| Some other race alone, not Hispanic | 0.0% ±0.7 pts | 0.2% |
| Born outside the United States | 22.7% ±6.3 pts | 14.0% |
| Speak a language other than English at home (age 5+) | 29.1% ±9.5 pts | 16.9% |
| Civilian veterans (age 18+) | 3.9% ±1.9 pts | 4.7% |
| With a disability | 6.8% ±2.9 pts | 6.4% |
| No health insurance coverage | 0.3% ±0.4 pts | 0.8% |
| High school graduate or higher (age 25+) | 99.2% ±0.9 pts | 99.0% |
| Bachelor's degree or higher (age 25+) | 83.0% ±4.1 pts | 79.0% |
| Graduate or professional degree (age 25+) | 44.8% ±7.7 pts | 37.8% |
| Lived in the same house a year earlier | 86.7% ±7.2 pts | 89.6% |
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 3500 earn?
Half of the 2,376 households in Census Tract 3500 earn less than $192,961 a year (±$25,700), against $127,229 across Contra Costa County: 41st highest of the county's 239 tracts with a reliable estimate. 4.2% of residents live below the poverty line.
| Measure | Tract 3500 | Lafayette |
|---|---|---|
| Median household income | $192,961 ±$25,700 | $228,250 |
| Mean household income | $275,827 ±$35,791 | $325,365 |
| Per capita income | $113,379 ±$15,191 | $123,402 |
| People below the poverty line | 4.2% ±2.6 pts | 2.9% |
| Children under 18 below the poverty line | 2.9% ±4.5 pts | 1.5% |
| Households receiving SNAP | 1.8% ±1.7 pts | 1.5% |
| Households with a computer | 100.0% ±1.8 pts | 99.6% |
| Households with a broadband subscription | 100.0% ±1.8 pts | 98.5% |
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 3500?
Owners occupy 63.8% of Census Tract 3500's occupied homes and renters 36.2%. The median owner-occupied home is valued at $1,620,600 by its owner (±$104,938). The median renter pays $2,837 a month including utilities, and 26.5% of renters pay 35% or more of their income on rent.
| Measure | Tract 3500 | Lafayette |
|---|---|---|
| Median home value (owner-occupied) | $1,620,600 ±$104,938 | $2,000,000 or more |
| Median gross rent | $2,837 ±$294 | $2,892 |
| Renters paying 35% or more of income on rent | 26.5% ±11.4 pts | 31.7% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 63.8% ±7.2 pts | 77.1% |
| Renter-occupied homes | 36.2% ±7.2 pts | 22.9% |
| Housing units | 2,592 ±253 | 9,998 |
| Single-family detached homes | 49.5% ±8.8 pts | 74.3% |
| Mobile homes | 0.6% ±1.0 pts | 0.2% |
| Built 2020 or later | 4.2% ±2.5 pts | 1.3% |
| Built 2010 to 2019 | 6.0% ±3.8 pts | 6.1% |
| Built 1939 or earlier | 0.6% ±0.9 pts | 4.3% |
| Households with no vehicle | 2.9% ±3.3 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 3500 get to work?
45.9% of Census Tract 3500's workers drive alone and 37.7% work from home. The average trip to work takes 30.0 minutes.
| Measure | Tract 3500 | Lafayette |
|---|---|---|
| In the labor force (age 16+) | 67.0% ±5.8 pts | 63.7% |
| Unemployment rate | 3.4% ±2.5 pts | 4.3% |
| Drove alone to work | 45.9% ±7.5 pts | 41.4% |
| Carpooled | 1.6% ±1.5 pts | 1.7% |
| Public transportation | 9.1% ±5.3 pts | 10.1% |
| Walked | 4.7% ±3.4 pts | 2.6% |
| Worked from home | 37.7% ±6.2 pts | 42.9% |
| Mean travel time to work | 30.0 min ±4.4 | 29.3 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 3500 compare with the other tracts in Contra Costa County?
Among Contra Costa County's tracts with a reliable estimate, Census Tract 3500 ranks as shown below (1 = highest).
| Measure | In Contra Costa County | In Lafayette |
|---|---|---|
| Population | 61st of 241 | 1st of 4 |
| Residents per square mile | 186th of 241 | 2nd of 4 |
| Median household income | 41st of 239 | 3rd of 4 |
| Per capita income | 16th of 241 | 3rd of 4 |
| Median home value | 30th of 236 | 4th of 4 |
| Median gross rent | 81st of 236 | 3rd of 3 |
| Poverty rate | 119th of 134 | 1st of 1 |
| Bachelor's degree or higher | 7th of 239 | 2nd of 4 |
| Median age | 85th of 241 | 4th of 4 |
| Owner-occupied share | 162nd of 240 | 3rd of 4 |
The tracts next to it on Contra Costa County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 3452.03 | 38th | $203,304±$57,040 · within the margin of this tract |
| Tract 3522.02 | 39th | $196,250±$31,935 · within the margin of this tract |
| Tract 3910 | 40th | $195,250±$47,042 · within the margin of this tract |
| Tract 3500 | 41st | $192,961±$25,700 |
| Tract 3902 | 42nd | $192,667±$30,209 · within the margin of this tract |
| Tract 3553.09 | 43rd | $190,882±$25,976 · within the margin of this tract |
| Tract 3451.02 | 44th | $189,375±$12,629 · 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 3500?
1 of the 18 figures for Census Tract 3500 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