City · California
Los Altos, California
Los Altos, city, in Santa Clara County, California. Los Altos had 30,965 residents on July 1, 2025 by the Census Bureau's estimate, down 1.6% since 2020; the 2020 Census counted 31,625 and the ACS 2020-2024 5-year estimates put it at 30,698 (±67). GEOID 0643280.
Residents, July 2025 estimate
30,965
Census Bureau estimate (no margin published)
2020 Census count: 31,625 · ACS 2020-2024: 30,698 ±67
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
California: $99,122
Median home value
$2,000,000 or more
The survey's top or bottom value; no margin is published
California: $734,700
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
California: $2,036
Where is Los Altos and what county is it in?
Los Altos is a city in Santa Clara County, California. It covers 6.5 square miles of land, 4,836 residents per square mile in 2020.
Los Altos is in the San Jose-Sunnyvale-Santa Clara, CA metropolitan statistical area, which takes in 2 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 Los Altos, and is it growing?
The Census Bureau estimates that 30,965 people lived in Los Altos on July 1, 2025, down 1.6% since 2020, a steeper fall than California's (−0.5%). The 2020 Census counted 31,625 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 30,698 (±67).
| Measure | Los Altos | Santa Clara County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 30,698 ±67 | 1,902,047 | +194 |
| Households | 10,840 ±264 | 659,353 | no clear change |
| Average household size | 2.81 ±0.07 | 2.82 | no clear change |
| Housing units | 11,781 ±314 | 698,837 | +724 |
Los Altos's population since 2000
From 27,693 in 2000 to 30,965 in 2025: up 11.8%. The 2000, 2010 and 2020 figures are census counts, each for Los Altos as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
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 Los Altos?
The median resident of Los Altos is 45.9 years old; 24.2% are under 18 and 20.8% are 65 or older. The largest group is non-Hispanic white residents at 49.5%, then non-Hispanic Asian residents at 38.9%. 35.5% of residents were born outside the United States.
| Measure | Los Altos | Santa Clara County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 45.9 ±1.4 | 38.1 | no clear change |
| Under 18 years | 24.2% ±1.5 pts | 20.5% | – |
| 65 years and over | 20.8% ±1.4 pts | 14.8% | – |
| Male | 50.7% ±1.3 pts | 51.0% | – |
| Hispanic or Latino (any race) | 6.1% ±1.7 pts | 25.0% | no clear change |
| White alone, not Hispanic | 49.5% ±2.9 pts | 27.2% | −8.6 pts |
| Black or African American alone, not Hispanic | 0.1% ±0.1 pts | 2.2% | – |
| Asian alone, not Hispanic | 38.9% ±3.0 pts | 40.3% | +7.5 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.1 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.1 pts | 0.4% | – |
| Two or more races, not Hispanic | 4.4% ±0.9 pts | 4.2% | – |
| Some other race alone, not Hispanic | 1.0% ±0.8 pts | 0.6% | – |
| Born outside the United States | 35.5% ±2.3 pts | 41.5% | +4.2 pts |
| Speak a language other than English at home (age 5+) | 38.8% ±3.2 pts | 55.2% | – |
| Civilian veterans (age 18+) | 2.2% ±0.5 pts | 2.6% | – |
| With a disability | 6.8% ±1.1 pts | 9.0% | – |
| No health insurance coverage | 1.4% ±0.6 pts | 3.9% | no clear change |
| High school graduate or higher (age 25+) | 99.0% ±0.4 pts | 89.3% | – |
| Bachelor's degree or higher (age 25+) | 88.1% ±1.7 pts | 56.5% | +3.9 pts |
| Graduate or professional degree (age 25+) | 55.7% ±2.0 pts | 28.3% | – |
| Lived in the same house a year earlier | 89.1% ±1.9 pts | 86.0% | – |
| Moved from another state in the past year | 0.7% ±0.3 pts | 1.5% | – |
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 Los Altos earn?
Half of Los Altos's 10,840 households earn less than $250,000 or more a year (), against $164,281 in Santa Clara County and $99,122 in California. In 2015-2019 the median was $250,000 or more in 2024 dollars, so it fell by $39,554 after inflation. 3.2% of residents live below the poverty line.
| Measure | Los Altos | Santa Clara County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $250,000 or more | $164,281 | −$39,554 |
| Mean household income | $417,182 ±$25,466 | $227,007 | – |
| Per capita income | $149,247 ±$8,439 | $80,312 | no clear change |
| People below the poverty line | 3.2% ±1.3 pts | 7.1% | no clear change |
| Children under 18 below the poverty line | 2.8% ±2.0 pts | 7.0% | – |
| Households receiving SNAP | 1.0% ±0.5 pts | 6.6% | – |
| Households with a computer | 99.4% ±0.4 pts | 98.0% | – |
| Households with a broadband subscription | 98.6% ±0.6 pts | 95.6% | – |
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 Los Altos?
Owners occupy 81.7% of Los Altos's occupied homes and renters 18.3%. The median owner-occupied home is valued at $2,000,000 or more by its owner (). The median renter pays $3,500 or more a month including utilities, and 34.0% of renters pay 35% or more of their income on rent.
| Measure | Los Altos | Santa Clara County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $1,490,600 | −$461,388 |
| Median gross rent | $3,500 or more | $2,857 | −$422 |
| Renters paying 35% or more of income on rent | 34.0% ±7.3 pts | 36.4% | +13.3 pts |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more | – |
| Owner-occupied homes | 81.7% ±2.1 pts | 55.1% | no clear change |
| Renter-occupied homes | 18.3% ±2.1 pts | 44.9% | – |
| Housing units | 11,781 ±314 | 698,837 | +724 |
| Homeowner vacancy rate | 1.3% ±1.1 pts | 0.7% | – |
| Rental vacancy rate | 4.6% ±3.5 pts | 5.1% | – |
| Single-family detached homes | 82.1% ±1.9 pts | 50.7% | – |
| Mobile homes | 0.2% ±0.2 pts | 2.8% | – |
| Built 2020 or later | 2.4% ±1.2 pts | 1.5% | – |
| Built 2010 to 2019 | 8.9% ±1.7 pts | 9.1% | – |
| Built 1939 or earlier | 3.5% ±0.7 pts | 4.7% | – |
| Households with no vehicle | 3.1% ±1.1 pts | 6.0% | – |
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 many new homes is Los Altos building?
Builders took permits for 133 new housing units in Los Altos in 2025 (81 in single-family houses), 4.3 per 1,000 residents against 2.6 across California.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Los Altos work and get to work?
50.7% of Los Altos's workers drive alone and 39.4% work from home. The average trip to work takes 22.3 minutes. The unemployment rate in 2020-2024 averaged 4.8%.
| Measure | Los Altos | Santa Clara County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 57.7% ±2.0 pts | 67.4% | – |
| Unemployment rate | 4.8% ±1.3 pts | 4.9% | no clear change |
| Drove alone to work | 50.7% ±2.9 pts | 59.9% | – |
| Carpooled | 4.2% ±1.2 pts | 9.0% | – |
| Public transportation | 0.7% ±0.4 pts | 2.3% | – |
| Walked | 1.9% ±0.9 pts | 2.1% | – |
| Worked from home | 39.4% ±3.3 pts | 23.9% | +28.9 pts |
| Mean travel time to work | 22.3 min ±1.2 | 26.2 min | −1.9 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
What census tracts are in Los Altos?
7 census tracts lie mostly in Los Altos, and 10 more reach into it (2020 census blocks). Their median household incomes run from $250,000 or more (Tract 5100.02) to $250,000 or more (Tract 5100.01).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 5100.01Santa Clara County | 5,852 | $250,000 or more |
| Tract 5105Santa Clara County | 4,911 | $250,000 or more |
| Tract 5103Santa Clara County | 4,649 | $250,000 or more |
| Tract 5102Santa Clara County | 4,565 | $250,000 or more |
| Tract 5100.02Santa Clara County | 4,131 | $250,000 or more |
| Tract 5104Santa Clara County | 3,495 | $250,000 or more |
| Tract 5101Santa Clara County | 2,792 | $250,000 or more |
| Tract 5094.01Santa Clara County | 4,746 | $149,258 |
| Tract 5094.03Santa Clara County | 4,115 | $177,847 |
| Tract 5094.04Santa Clara County | 6,256 | $203,864 |
| Tract 5099.01Santa Clara County | 2,602 | $250,000 or more |
| Tract 5078.05Santa Clara County | 4,888 | $201,939 |
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 Los Altos) · Census block assignment files
How does Los Altos compare with other places in California?
By the Census Bureau's July 2025 estimates, Los Altos is the 1,330th-most populous of the 19,476 U.S. incorporated places that have one and the 240th-most populous of 483 in California.
Los Altos ranks 1st of 1,037 places in California with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 240th | 483 |
| Growth 2020-2025 (PEP) | 232nd | 469 |
| Residents per square mile | 261st | 1,077 |
| Median household income | 1st | 1,037 |
| Per capita income | 17th | 1,073 |
| Median home value | 1st | 1,054 |
| Median gross rent | 1st | 987 |
| Poverty rate | 823rd | 836 |
| Bachelor's degree or higher | 5th | 988 |
| Median age | 272nd | 1,075 |
| Owner-occupied share | 223rd | 1,064 |
| Work from home | 37th | 822 |
| Travel time to work | 871st | 1,069 |
Los Altos's figures with every place in California (CSV)
Every place in California, sortable · Compare Los Altos 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 Los Altos?
8 of the 57 figures for Los Altos 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 Los Altos 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' public schools in Los Altos.