Census-designated place · California
San Lorenzo, California
San Lorenzo, census-designated place, in Alameda County, California. San Lorenzo had 29,171 people in the ACS 2020-2024 5-year estimates (±1,485). GEOID 0668112.
Residents, 2020-2024
29,171
±1,485 (90% margin)
2020 Census count: 29,581
Median household income
$112,660
±$4,669 (90% margin)
California: $99,122
Median home value
$847,100
±$11,591 (90% margin)
California: $734,700
Median gross rent
$2,163
±$166 (90% margin)
California: $2,036
Where is San Lorenzo and what county is it in?
San Lorenzo is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Alameda County, California. It covers 3.0 square miles of land, 9,711 residents per square mile in 2020.
San Lorenzo is in the San Francisco-Oakland-Fremont, CA metropolitan statistical area, which takes in 5 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in San Lorenzo, and is it growing?
The 2020-2024 American Community Survey puts San Lorenzo's population at 29,171 (±1,485). The 2020 Census counted 29,581 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; San Lorenzo is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | San Lorenzo | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 29,171 ±1,485 | 1,649,473 | +3,602 |
| Households | 8,571 ±375 | 598,246 | +997 |
| Average household size | 3.37 ±0.14 | 2.70 | no clear change |
| Housing units | 8,816 ±359 | 637,212 | +1,038 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in San Lorenzo?
The median resident of San Lorenzo is 41.7 years old; 19.0% are under 18 and 17.7% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 42.1%, then non-Hispanic Asian residents at 31.3%. 41.7% of residents were born outside the United States.
| Measure | San Lorenzo | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.7 ±1.5 | 39.0 | +2.0 |
| Under 18 years | 19.0% ±1.7 pts | 19.8% | – |
| 65 years and over | 17.7% ±1.9 pts | 15.4% | – |
| Male | 51.2% ±1.4 pts | 49.6% | – |
| Hispanic or Latino (any race) | 42.1% ±3.7 pts | 23.4% | no clear change |
| White alone, not Hispanic | 18.2% ±2.1 pts | 27.4% | −7.0 pts |
| Black or African American alone, not Hispanic | 3.8% ±1.6 pts | 9.3% | no clear change |
| Asian alone, not Hispanic | 31.3% ±3.7 pts | 32.7% | +5.6 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.3% ±0.2 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.8% ±0.7 pts | 0.7% | – |
| Two or more races, not Hispanic | 2.8% ±1.0 pts | 5.6% | – |
| Some other race alone, not Hispanic | 0.7% ±0.5 pts | 0.6% | – |
| Born outside the United States | 41.7% ±2.7 pts | 34.7% | +9.6 pts |
| Speak a language other than English at home (age 5+) | 59.9% ±3.4 pts | 47.2% | – |
| Civilian veterans (age 18+) | 2.8% ±0.8 pts | 3.0% | – |
| With a disability | 13.1% ±1.9 pts | 10.3% | – |
| No health insurance coverage | 2.3% ±0.9 pts | 4.0% | −1.7 pts |
| High school graduate or higher (age 25+) | 81.4% ±2.5 pts | 88.8% | – |
| Bachelor's degree or higher (age 25+) | 25.3% ±2.3 pts | 52.2% | no clear change |
| Graduate or professional degree (age 25+) | 4.7% ±1.0 pts | 23.4% | – |
| Lived in the same house a year earlier | 94.2% ±2.0 pts | 87.9% | – |
| Moved from another state in the past year | 0.9% ±0.6 pts | 1.2% | – |
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 San Lorenzo earn?
Half of San Lorenzo's 8,571 households earn less than $112,660 a year (±$4,669), against $129,367 in Alameda County and $99,122 in California. In 2015-2019 it was $119,729 in 2024 dollars; the margins of error cannot tell the two periods apart. 4.6% of residents live below the poverty line.
| Measure | San Lorenzo | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $112,660 ±$4,669 | $129,367 | no clear change |
| Mean household income | $136,153 ±$7,548 | $177,144 | – |
| Per capita income | $41,832 ±$2,080 | $65,862 | no clear change |
| People below the poverty line | 4.6% ±1.3 pts | 9.2% | no clear change |
| Children under 18 below the poverty line | 4.3% ±3.0 pts | 8.8% | – |
| Households receiving SNAP | 12.3% ±2.4 pts | 9.9% | – |
| Households with a computer | 95.5% ±2.0 pts | 97.4% | – |
| Households with a broadband subscription | 93.2% ±2.4 pts | 94.4% | – |
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 San Lorenzo?
Owners occupy 67.2% of San Lorenzo's occupied homes and renters 32.8%. The median owner-occupied home is valued at $847,100 by its owner (±$11,591). The median renter pays $2,163 a month including utilities, and 38.2% of renters pay 35% or more of their income on rent.
| Measure | San Lorenzo | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $847,100 ±$11,591 | $1,090,100 | +$125,421 |
| Median gross rent | $2,163 ±$166 | $2,357 | no clear change |
| Renters paying 35% or more of income on rent | 38.2% ±7.7 pts | 41.8% | no clear change |
| Median monthly owner costs, with a mortgage | $3,016 ±$135 | $3,810 | – |
| Owner-occupied homes | 67.2% ±3.6 pts | 54.4% | −6.8 pts |
| Renter-occupied homes | 32.8% ±3.6 pts | 45.6% | – |
| Housing units | 8,816 ±359 | 637,212 | +1,038 |
| Homeowner vacancy rate | 0.8% ±1.0 pts | 0.8% | – |
| Rental vacancy rate | 2.2% ±2.3 pts | 5.7% | – |
| Single-family detached homes | 78.3% ±2.6 pts | 51.0% | – |
| Mobile homes | 2.1% ±1.1 pts | 1.3% | – |
| Built 2020 or later | 0.1% ±0.2 pts | 1.4% | – |
| Built 2010 to 2019 | 1.9% ±1.0 pts | 6.8% | – |
| Built 1939 or earlier | 5.8% ±2.3 pts | 19.6% | – |
| Households with no vehicle | 4.8% ±1.9 pts | 10.0% | – |
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 San Lorenzo work and get to work?
74.7% of San Lorenzo's workers drive alone and 8.3% work from home. The average trip to work takes 31.0 minutes. The unemployment rate in 2020-2024 averaged 5.1%.
| Measure | San Lorenzo | Alameda County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 67.0% ±2.3 pts | 66.9% | – |
| Unemployment rate | 5.1% ±1.3 pts | 5.4% | no clear change |
| Drove alone to work | 74.7% ±2.8 pts | 52.6% | – |
| Carpooled | 11.2% ±2.1 pts | 8.3% | – |
| Public transportation | 3.3% ±1.1 pts | 7.7% | – |
| Walked | 1.0% ±0.5 pts | 2.8% | – |
| Worked from home | 8.3% ±1.7 pts | 25.7% | +5.3 pts |
| Mean travel time to work | 31.0 min ±1.8 | 31.0 min | no clear change |
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 census tracts are in San Lorenzo?
6 census tracts lie mostly in San Lorenzo, and 1 more reaches into it (2020 census blocks). Their median household incomes run from $90,595 (Tract 4362) to $128,333 (Tract 4360).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 4358Alameda County | 5,725 | $118,835 |
| Tract 4361Alameda County | 5,454 | $99,000 |
| Tract 4360Alameda County | 5,298 | $128,333 |
| Tract 4359Alameda County | 4,985 | $117,891 |
| Tract 4357Alameda County | 4,974 | $103,106 |
| Tract 4362Alameda County | 3,989 | $90,595 |
| Tract 4334Alameda County | 6,008 | $135,536 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in San Lorenzo) · Census block assignment files
How does San Lorenzo compare with other places in California?
San Lorenzo ranks 336th of 1,037 places in California with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 275th | 1,076 |
| Residents per square mile | 70th | 1,077 |
| Median household income | 336th | 1,037 |
| Per capita income | 551st | 1,073 |
| Median home value | 315th | 1,054 |
| Median gross rent | 340th | 987 |
| Poverty rate | 784th | 836 |
| Bachelor's degree or higher | 593rd | 988 |
| Median age | 438th | 1,075 |
| Owner-occupied share | 514th | 1,064 |
| Work from home | 677th | 822 |
| Travel time to work | 323rd | 1,069 |
San Lorenzo's figures with every place in California (CSV)
Every place in California, sortable · Compare San Lorenzo with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for San Lorenzo?
8 of the 57 figures for San Lorenzo 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.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. 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 · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for San Lorenzo are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.