Martinez Flag

Martinez

County Seat:
Yes
Area (mi²):
12.643
State:
California

Martinez is a city located in Contra Costa County, California. Martinez has a 2025 population of 36,960 . It is also the county seat of Contra Costa County . Martinez is currently declining at a rate of -0.12% annually and its population has decreased by -0.61% since the most recent census, which recorded a population of 37,187 in 2020.

The average household income in Martinez is $154,241 with a poverty rate of 6.68%. The median age in Martinez is 42.3 years: 41.1 years for males, and 43.7 years for females. For every 100 females there are 100.4 males.

37K
Total Population
2,923
Density (mi²)
-46 -0.12%
Growth

Martinez Population

Martinez Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Martinez includes 63.57% White, 10.41% Asian, 4.28% other race, and smaller percentages for Black or African American, Native American and multiracial populations.

Population by Race

White (63.57%)

Two or more races (18.44%)

Asian (10.41%)

Other race (4.28%)

Black or African American (2.46%)

Native American (0.84%)

Race
Population
Percentage (of total)
White23,47563.57%
Two or more races6,80918.44%
Asian3,84510.41%
Other race1,5814.28%
Black or African American9072.46%
Native American3090.84%

Martinez Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Martinez's average per capita income is $80,336. Household income levels show a median of $125,436. The poverty rate stands at 6.68%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$164,133-
Families$150,413$171,568
Households$125,436$154,241
Non Families$85,196$114,053

$80,336

Average Income

$125,436

Median Household Income

6.68%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)