City · California
Martinez, California
Martinez, city, in Contra Costa County, California. Martinez had 36,849 residents on July 1, 2025 by the Census Bureau's estimate, down 1.1% since 2020; the 2020 Census counted 37,287 and the ACS 2020-2024 5-year estimates put it at 36,903 (±41). GEOID 0646114.
Residents, July 2025 estimate
36,849
Census Bureau estimate (no margin published)
2020 Census count: 37,287 · ACS 2020-2024: 36,903 ±41
Median household income
$127,355
±$8,294 (90% margin)
California: $99,122
Median home value
$859,800
±$15,759 (90% margin)
California: $734,700
Median gross rent
$2,353
±$87 (90% margin)
California: $2,036
Where is Martinez and what county is it in?
Martinez is a city in Contra Costa County, California. It covers 12.6 square miles of land, 2,949 residents per square mile in 2020.
Martinez 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 Martinez, and is it growing?
The Census Bureau estimates that 36,849 people lived in Martinez on July 1, 2025, down 1.1% since 2020, a steeper fall than California's (−0.5%). The 2020 Census counted 37,287 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 36,903 (±41).
| Measure | Martinez | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 36,903 ±41 | 1,165,012 | −1,387 |
| Households | 14,723 ±484 | 414,417 | no clear change |
| Average household size | 2.46 ±0.08 | 2.78 | no clear change |
| Housing units | 15,178 ±506 | 429,260 | no clear change |
Martinez's population since 2000
From 35,866 in 2000 to 36,849 in 2025: up 2.7%. The 2000, 2010 and 2020 figures are census counts, each for Martinez 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 Martinez?
The median resident of Martinez is 42.6 years old; 19.8% are under 18 and 18.9% are 65 or older. The largest group is non-Hispanic white residents at 58.9%, then Hispanic or Latino residents (of any race) at 20.2%. 12.0% of residents were born outside the United States.
| Measure | Martinez | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 42.6 ±1.1 | 40.5 | no clear change |
| Under 18 years | 19.8% ±1.8 pts | 22.0% | – |
| 65 years and over | 18.9% ±1.7 pts | 17.1% | – |
| Male | 50.4% ±1.8 pts | 49.2% | – |
| Hispanic or Latino (any race) | 20.2% ±2.6 pts | 27.6% | +3.5 pts |
| White alone, not Hispanic | 58.9% ±2.9 pts | 38.1% | −7.4 pts |
| Black or African American alone, not Hispanic | 2.2% ±0.7 pts | 7.9% | no clear change |
| Asian alone, not Hispanic | 10.0% ±1.3 pts | 18.6% | no clear change |
| 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% ±0.1 pts | 0.5% | – |
| Two or more races, not Hispanic | 8.1% ±1.6 pts | 6.3% | – |
| Some other race alone, not Hispanic | 0.5% ±0.4 pts | 0.8% | – |
| Born outside the United States | 12.0% ±1.6 pts | 26.6% | no clear change |
| Speak a language other than English at home (age 5+) | 17.4% ±2.2 pts | 37.5% | – |
| Civilian veterans (age 18+) | 6.8% ±1.3 pts | 4.2% | – |
| With a disability | 12.7% ±1.7 pts | 11.1% | – |
| No health insurance coverage | 2.2% ±0.8 pts | 4.6% | no clear change |
| High school graduate or higher (age 25+) | 95.6% ±0.8 pts | 89.6% | – |
| Bachelor's degree or higher (age 25+) | 46.7% ±2.7 pts | 45.2% | +5.1 pts |
| Graduate or professional degree (age 25+) | 14.0% ±1.7 pts | 17.7% | – |
| Lived in the same house a year earlier | 89.1% ±1.8 pts | 90.0% | – |
| Moved from another state in the past year | 0.7% ±0.7 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 Martinez earn?
Half of Martinez's 14,723 households earn less than $127,355 a year (±$8,294), against $127,229 in Contra Costa County and $99,122 in California. In 2015-2019 it was $132,088 in 2024 dollars; the margins of error cannot tell the two periods apart. 6.3% of residents live below the poverty line.
| Measure | Martinez | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $127,355 ±$8,294 | $127,229 | no clear change |
| Mean household income | $157,161 ±$7,172 | $174,872 | – |
| Per capita income | $63,648 ±$2,996 | $62,927 | no clear change |
| People below the poverty line | 6.3% ±1.4 pts | 8.4% | no clear change |
| Children under 18 below the poverty line | 4.0% ±2.5 pts | 10.0% | no clear change |
| Households receiving SNAP | 6.3% ±1.8 pts | 8.5% | – |
| Households with a computer | 98.9% ±0.5 pts | 97.7% | – |
| Households with a broadband subscription | 95.9% ±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 Martinez?
Owners occupy 70.8% of Martinez's occupied homes and renters 29.2%. The median owner-occupied home is valued at $859,800 by its owner (±$15,759). The median renter pays $2,353 a month including utilities, and 38.4% of renters pay 35% or more of their income on rent.
| Measure | Martinez | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $859,800 ±$15,759 | $866,800 | +$125,814 |
| Median gross rent | $2,353 ±$87 | $2,375 | +$226 |
| Renters paying 35% or more of income on rent | 38.4% ±5.9 pts | 47.4% | no clear change |
| Median monthly owner costs, with a mortgage | $3,225 ±$103 | $3,435 | – |
| Owner-occupied homes | 70.8% ±2.4 pts | 68.0% | +3.5 pts |
| Renter-occupied homes | 29.2% ±2.4 pts | 32.0% | – |
| Housing units | 15,178 ±506 | 429,260 | no clear change |
| Homeowner vacancy rate | 0.2% ±0.4 pts | 0.7% | – |
| Rental vacancy rate | 3.5% ±2.9 pts | 2.8% | – |
| Single-family detached homes | 63.7% ±3.0 pts | 67.5% | – |
| Mobile homes | 0.3% ±0.3 pts | 1.4% | – |
| Built 2020 or later | 0.2% ±0.2 pts | 1.1% | – |
| Built 2010 to 2019 | 1.3% ±0.7 pts | 5.8% | – |
| Built 1939 or earlier | 9.1% ±1.5 pts | 4.2% | – |
| Households with no vehicle | 3.9% ±1.3 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 many new homes is Martinez building?
Builders took permits for 12 new housing units in Martinez in 2025 (12 in single-family houses), 0.3 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 Martinez work and get to work?
64.3% of Martinez's workers drive alone and 22.3% work from home. The average trip to work takes 28.4 minutes. The unemployment rate in 2020-2024 averaged 5.8%.
| Measure | Martinez | Contra Costa County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.9% ±2.4 pts | 64.7% | – |
| Unemployment rate | 5.8% ±1.5 pts | 6.5% | +1.9 pts |
| Drove alone to work | 64.3% ±4.0 pts | 59.7% | – |
| Carpooled | 6.2% ±2.1 pts | 10.0% | – |
| Public transportation | 2.5% ±0.9 pts | 5.4% | – |
| Walked | 3.1% ±1.2 pts | 1.8% | – |
| Worked from home | 22.3% ±3.3 pts | 21.3% | +16.5 pts |
| Mean travel time to work | 28.4 min ±2.3 | 35.3 min | −4.5 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 Martinez?
7 census tracts lie mostly in Martinez, and 7 more reach into it (2020 census blocks). Their median household incomes run from $58,214 (Tract 3160) to $171,343 (Tract 3200.03).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 3211.01Contra Costa County | 7,268 | $152,063 |
| Tract 3211.03Contra Costa County | 4,642 | $158,750 |
| Tract 3200.04Contra Costa County | 6,401 | $125,752 |
| Tract 3180Contra Costa County | 3,514 | $101,947 |
| Tract 3200.03Contra Costa County | 2,928 | $171,343 |
| Tract 3211.02Contra Costa County | 5,830 | $153,048 |
| Tract 3170Contra Costa County | 2,159 | $86,365 |
| Tract 3190.02Contra Costa County | 3,819 | $112,543 |
| Tract 3160Contra Costa County | 1,334 | $58,214 |
| Tract 3190.01Contra Costa County | 4,060 | $146,071 |
| Tract 3200.01Contra Costa County | 3,276 | $98,602 |
| Tract 3560.02Contra Costa County | 5,612 | $121,275 |
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 Martinez) · Census block assignment files
How does Martinez compare with other places in California?
By the Census Bureau's July 2025 estimates, Martinez is the 1,129th-most populous of the 19,476 U.S. incorporated places that have one and the 216th-most populous of 483 in California.
Martinez ranks 245th 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 | 216th | 483 |
| Growth 2020-2025 (PEP) | 212th | 469 |
| Residents per square mile | 469th | 1,077 |
| Median household income | 245th | 1,037 |
| Per capita income | 240th | 1,073 |
| Median home value | 303rd | 1,054 |
| Median gross rent | 251st | 987 |
| Poverty rate | 686th | 836 |
| Bachelor's degree or higher | 269th | 988 |
| Median age | 398th | 1,075 |
| Owner-occupied share | 426th | 1,064 |
| Work from home | 248th | 822 |
| Travel time to work | 490th | 1,069 |
Martinez's figures with every place in California (CSV)
Every place in California, sortable · Compare Martinez 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 Martinez?
8 of the 57 figures for Martinez 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 Martinez 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 Martinez.