Census tract · Alameda County
Census Tract 4231, Alameda County, California
Census Tract 4231, GEOID 06001423100, in Alameda County, California, entirely within Berkeley. 4,286 residents in the ACS 2020-2024 5-year estimates (±569); the 2020 Census counted 4,335.
Residents, 2020-2024
4,286
±569 (90% margin)
2020 Census count: 4,335
Median household income
$54,787
±$14,265 (90% margin)
Alameda County: $129,367
Median home value
$1,159,900
±$44,935 (90% margin)
Alameda County: $1,090,100
Median gross rent
$2,174
±$479 (90% margin)
Alameda County: $2,357
Where is Census Tract 4231?
Census Tract 4231 is one of 379 census tracts in Alameda County, California. It covers 0.29 square miles of land, 15,000 residents per square mile in 2020. Its GEOID, 06001423100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Berkeley | 100% |
4 census tracts border Census Tract 4231: Tract 4222 ($99,379), Tract 4230 ($110,536), Tract 4232 ($60,563) and Tract 4233 ($101,571). 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 4231?
The 2020-2024 American Community Survey puts Census Tract 4231's population at 4,286 (±569) in 2,066 households; the 2020 Census counted 4,335 residents and 2,076 housing units.
| Measure | Tract 4231 | Berkeley |
|---|---|---|
| Total population | 4,286±569 | 120,257 |
| Households | 2,066±294 | 47,135 |
| Average household size | 2.01±0.14 | 2.27 |
| Housing units | 2,223±291 | 53,145 |
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 4231?
The median resident of Census Tract 4231 is 43.6 years old; 15.6% are under 18 and 24.1% are 65 or older. The largest group is non-Hispanic white residents at 40.6%, then non-Hispanic Black residents at 20.6%. 23.0% of residents were born outside the United States.
| Measure | Tract 4231 | Berkeley |
|---|---|---|
| Median age | 43.6±2.0 | 33.2 |
| Under 18 years | 15.6%±3.8 pts | 12.7% |
| 65 years and over | 24.1%±5.0 pts | 16.7% |
| Hispanic or Latino (any race) | 9.2%±4.3 pts | 12.8% |
| White alone, not Hispanic | 40.6%±7.4 pts | 49.9% |
| Black or African American alone, not Hispanic | 20.6%±9.7 pts | 7.7% |
| Asian alone, not Hispanic | 17.4%±5.8 pts | 20.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.0 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.2%±0.4 pts | 0.1% |
| Two or more races, not Hispanic | 8.4%±3.5 pts | 8.0% |
| Some other race alone, not Hispanic | 3.5%±4.5 pts | 1.1% |
| Born outside the United States | 23.0%±6.2 pts | 21.1% |
| Speak a language other than English at home (age 5+) | 24.0%±6.9 pts | 30.7% |
| Civilian veterans (age 18+) | 1.8%±1.1 pts | 2.1% |
| With a disability | 23.4%±6.8 pts | 10.9% |
| No health insurance coverage | 2.7%±2.1 pts | 2.8% |
| High school graduate or higher (age 25+) | 93.9%±3.6 pts | 95.8% |
| Bachelor's degree or higher (age 25+) | 57.0%±8.5 pts | 74.9% |
| Graduate or professional degree (age 25+) | 30.3%±6.8 pts | 42.0% |
| Lived in the same house a year earlier | 83.2%±6.0 pts | 74.8% |
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 4231 earn?
Half of the 2,066 households in Census Tract 4231 earn less than $54,787 a year (±$14,265), against $129,367 across Alameda County: 355th highest of the county's 372 tracts with a reliable estimate. 20.9% of residents live below the poverty line.
| Measure | Tract 4231 | Berkeley |
|---|---|---|
| Median household income | $54,787±$14,265 | $108,092 |
| Mean household income | $117,022±$22,022 | $171,265 |
| Per capita income | $58,210±$11,128 | $69,534 |
| People below the poverty line | 20.9%±6.5 pts | 17.3% |
| Children under 18 below the poverty line | 16.5%±13.4 pts | 7.6% |
| Households receiving SNAP | 13.9%±6.3 pts | 9.7% |
| Households with a computer | 95.1%±3.6 pts | 98.0% |
| Households with a broadband subscription | 89.0%±5.6 pts | 94.3% |
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 4231?
Owners occupy 39.9% of Census Tract 4231's occupied homes and renters 60.1%. The median owner-occupied home is valued at $1,159,900 by its owner (±$44,935). The median renter pays $2,174 a month including utilities, and 65.4% of renters pay 35% or more of their income on rent.
| Measure | Tract 4231 | Berkeley |
|---|---|---|
| Median home value (owner-occupied) | $1,159,900±$44,935 | $1,413,900 |
| Median gross rent | $2,174±$479 | $2,133 |
| Renters paying 35% or more of income on rent | 65.4%±12.1 pts | 48.6% |
| Median monthly owner costs, with a mortgage | $3,408±$506 | $4,000 or more |
| Owner-occupied homes | 39.9%±8.5 pts | 44.2% |
| Renter-occupied homes | 60.1%±8.5 pts | 55.8% |
| Housing units | 2,223±291 | 53,145 |
| Single-family detached homes | 38.2%±6.4 pts | 40.4% |
| Mobile homes | 0.5%±0.8 pts | 0.2% |
| Built 2020 or later | 0.0%±1.9 pts | 0.7% |
| Built 2010 to 2019 | 4.6%±4.5 pts | 5.9% |
| Built 1939 or earlier | 41.6%±8.2 pts | 46.3% |
| Households with no vehicle | 28.0%±10.5 pts | 20.7% |
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 4231 get to work?
26.3% of Census Tract 4231's workers drive alone and 30.9% work from home. The average trip to work takes 32.0 minutes. The unemployment rate in 2020-2024 averaged 4.6%.
| Measure | Tract 4231 | Berkeley |
|---|---|---|
| In the labor force (age 16+) | 55.1%±9.2 pts | 60.1% |
| Unemployment rate | 4.6%±2.7 pts | 5.6% |
| Drove alone to work | 26.3%±6.9 pts | 27.2% |
| Carpooled | 2.9%±2.7 pts | 3.3% |
| Public transportation | 15.2%±5.0 pts | 12.4% |
| Walked | 15.4%±6.7 pts | 13.6% |
| Worked from home | 30.9%±7.9 pts | 37.1% |
| Mean travel time to work | 32.0 min±5.8 | 27.8 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 4231 compare with the other tracts in Alameda County?
Among Alameda County's tracts with a reliable estimate, Census Tract 4231 ranks as shown below (1 = highest).
| Measure | In Alameda County | In Berkeley |
|---|---|---|
| Population | 175th of 375 | 7th of 34 |
| Residents per square mile | 90th of 378 | 16th of 34 |
| Median household income | 355th of 372 | 27th of 31 |
| Per capita income | 225th of 377 | 25th of 34 |
| Median home value | 136th of 366 | 26th of 30 |
| Median gross rent | 255th of 368 | 20th of 34 |
| Poverty rate | 34th of 263 | 10th of 29 |
| Bachelor's degree or higher | 177th of 376 | 30th of 34 |
| Median age | 106th of 377 | 10th of 34 |
| Owner-occupied share | 259th of 366 | 18th of 30 |
The tracts next to it on Alameda County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4105 | 352nd | $58,991±$23,144 · within the margin of this tract |
| Tract 4030 | 353rd | $58,794±$16,880 · within the margin of this tract |
| Tract 4085 | 354th | $57,303±$18,129 · within the margin of this tract |
| Tract 4231 | 355th | $54,787±$14,265 |
| Tract 4236.02 | 356th | $53,952±$19,702 · within the margin of this tract |
| Tract 4059.01 | 357th | $53,233±$13,128 · within the margin of this tract |
| Tract 4087 | 358th | $53,116±$17,660 · 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 4231?
Every figure for Census Tract 4231 on this page has a coefficient of variation under 40%, the Census Bureau's threshold for a usable estimate.
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