Martinez

County:: Contra Costa County
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 35,861. It is also the county seat of Contra Costa County. Martinez is currently declining at a rate of -0.74% annually and its population has decreased by -3.59% since the most recent census, which recorded a population of 37,195 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.

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, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Asian

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	23,475	63.57%
Two or more races	6,809	18.44%
Asian	3,845	10.41%
Other race	1,581	4.28%
Black or African American	907	2.46%
Native American	309	0.84%
Native Hawaiian or Pacific Islander	0	0%

Martinez Marital Status

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