Census-designated place · California
Alamo, California
Alamo, census-designated place, in Contra Costa County, California. Alamo had 14,488 people in the ACS 2020-2024 5-year estimates (±1,348). GEOID 0600618.
Residents, 2020-2024
14,488
±1,348 (90% margin)
2020 Census count: 15,314
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 Alamo and what county is it in?
Alamo is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Contra Costa County, California. It covers 9.8 square miles of land, 1,560 residents per square mile in 2020.
Alamo 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 Alamo, and is it growing?
The 2020-2024 American Community Survey puts Alamo's population at 14,488 (±1,348). The 2020 Census counted 15,314 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Alamo is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Alamo | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 14,488 ±1,348 | 1,165,012 | no clear change |
| Households | 5,070 ±376 | 414,417 | no clear change |
| Average household size | 2.84 ±0.14 | 2.78 | no clear change |
| Housing units | 5,315 ±356 | 429,260 | no clear change |
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 Alamo?
The median resident of Alamo is 49.8 years old; 21.1% are under 18 and 25.0% are 65 or older. The largest group is non-Hispanic white residents at 72.3%, then non-Hispanic Asian residents at 12.1%. 14.5% of residents were born outside the United States.
| Measure | Alamo | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 49.8 ±2.7 | 40.5 | no clear change |
| Under 18 years | 21.1% ±2.4 pts | 22.0% | – |
| 65 years and over | 25.0% ±3.1 pts | 17.1% | – |
| Male | 50.1% ±2.1 pts | 49.2% | – |
| Hispanic or Latino (any race) | 6.7% ±2.8 pts | 27.6% | no clear change |
| White alone, not Hispanic | 72.3% ±4.2 pts | 38.1% | −7.9 pts |
| Black or African American alone, not Hispanic | 1.3% ±1.4 pts | 7.9% | – |
| Asian alone, not Hispanic | 12.1% ±2.0 pts | 18.6% | +3.4 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.1 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.3 pts | 0.5% | – |
| Two or more races, not Hispanic | 5.9% ±1.9 pts | 6.3% | – |
| Some other race alone, not Hispanic | 1.7% ±1.2 pts | 0.8% | – |
| Born outside the United States | 14.5% ±2.6 pts | 26.6% | no clear change |
| Speak a language other than English at home (age 5+) | 16.4% ±2.9 pts | 37.5% | – |
| Civilian veterans (age 18+) | 5.6% ±1.5 pts | 4.2% | – |
| With a disability | 9.0% ±1.8 pts | 11.1% | – |
| No health insurance coverage | 3.4% ±2.0 pts | 4.6% | – |
| High school graduate or higher (age 25+) | 98.1% ±1.1 pts | 89.6% | – |
| Bachelor's degree or higher (age 25+) | 77.5% ±3.9 pts | 45.2% | no clear change |
| Graduate or professional degree (age 25+) | 33.4% ±3.3 pts | 17.7% | – |
| Lived in the same house a year earlier | 89.8% ±3.2 pts | 90.0% | – |
| Moved from another state in the past year | 2.7% ±1.7 pts | 0.9% | – |
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 Alamo earn?
Half of Alamo's 5,070 households earn less than $250,000 or more a year (), against $127,229 in Contra Costa County and $99,122 in California. In 2015-2019 the median was $250,000 or more in 2024 dollars, so it fell by $44,806 after inflation.
| Measure | Alamo | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $250,000 or more | $127,229 | −$44,806 |
| Mean household income | $401,221 ±$40,935 | $174,872 | – |
| Per capita income | $141,615 ±$13,157 | $62,927 | no clear change |
| People below the poverty line | 2.1% ±1.4 pts | 8.4% | – |
| Children under 18 below the poverty line | 0.0% ±1.4 pts | 10.0% | – |
| Households receiving SNAP | 2.3% ±2.4 pts | 8.5% | – |
| Households with a computer | 98.9% ±0.6 pts | 97.7% | – |
| Households with a broadband subscription | 98.2% ±1.5 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 Alamo?
Owners occupy 91.8% of Alamo's occupied homes and renters 8.2%. 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 38.6% of renters pay 35% or more of their income on rent.
| Measure | Alamo | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $866,800 | −$55,873 |
| Median gross rent | $3,500 or more | $2,375 | no clear change |
| Renters paying 35% or more of income on rent | 38.6% ±24.9 pts | 47.4% | no clear change |
| Median monthly owner costs, with a mortgage | $4,000 or more | $3,435 | – |
| Owner-occupied homes | 91.8% ±3.2 pts | 68.0% | no clear change |
| Renter-occupied homes | 8.2% ±3.2 pts | 32.0% | – |
| Housing units | 5,315 ±356 | 429,260 | no clear change |
| Homeowner vacancy rate | 0.0% ±0.9 pts | 0.7% | – |
| Rental vacancy rate | 0.0% ±9.7 pts | 2.8% | – |
| Single-family detached homes | 93.2% ±2.6 pts | 67.5% | – |
| Mobile homes | 0.1% ±0.2 pts | 1.4% | – |
| Built 2020 or later | 0.8% ±0.9 pts | 1.1% | – |
| Built 2010 to 2019 | 4.5% ±2.5 pts | 5.8% | – |
| Built 1939 or earlier | 3.0% ±1.9 pts | 4.2% | – |
| Households with no vehicle | 2.3% ±1.7 pts | 5.2% | – |
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 Alamo work and get to work?
54.1% of Alamo's workers drive alone and 31.5% work from home. The average trip to work takes 29.2 minutes. The unemployment rate in 2020-2024 averaged 3.6%.
| Measure | Alamo | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 56.4% ±3.7 pts | 64.7% | – |
| Unemployment rate | 3.6% ±1.9 pts | 6.5% | no clear change |
| Drove alone to work | 54.1% ±4.9 pts | 59.7% | – |
| Carpooled | 8.1% ±4.1 pts | 10.0% | – |
| Public transportation | 2.3% ±1.5 pts | 5.4% | – |
| Walked | 2.3% ±1.2 pts | 1.8% | – |
| Worked from home | 31.5% ±4.8 pts | 21.3% | +12.8 pts |
| Mean travel time to work | 29.2 min ±3.6 | 35.3 min | −6.8 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
What census tracts are in Alamo?
2 census tracts lie mostly in Alamo, and 4 more reach into it (2020 census blocks). Their median household incomes run from $250,000 or more (Tract 3461.02) to $250,000 or more (Tract 3452.04).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 3461.02Contra Costa County | 5,478 | $250,000 or more |
| Tract 3342Contra Costa County | 7,522 | $189,153 |
| Tract 3452.04Contra Costa County | 3,212 | $250,000 or more |
| Tract 3462.06Contra Costa County | 3,304 | $250,000 or more |
| Tract 3461.01Contra Costa County | 3,281 | $250,000 or more |
| Tract 3462.05Contra Costa County | 3,769 | $233,333 |
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 Alamo) · Census block assignment files
How does Alamo compare with other places in California?
Alamo 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 (ACS 2020-2024) | 410th | 1,076 |
| Residents per square mile | 656th | 1,077 |
| Median household income | 1st | 1,037 |
| Per capita income | 24th | 1,073 |
| Median home value | 1st | 1,054 |
| Median gross rent | 1st | 987 |
| Bachelor's degree or higher | 42nd | 988 |
| Median age | 170th | 1,075 |
| Owner-occupied share | 63rd | 1,064 |
| Work from home | 100th | 822 |
| Travel time to work | 428th | 1,069 |
Alamo's figures with every place in California (CSV)
Every place in California, sortable · Compare Alamo 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 Alamo?
12 of the 57 figures for Alamo 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 Alamo 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.