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 2026 population of 36,915. 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 -0.73% since the most recent census, which recorded a population of 37,187 in 2020.

The median household income in Martinez is $127,355 with a poverty rate of 6.31%. The median age in Martinez is 42.6 years: 41.4 years for males, and 43.9 years for females. For every 100 females there are 101.5 males.

36.9K
Total Population
2,920
Density (mi²)
-45 -0.12%
Growth

Martinez Population

Martinez Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202636,915-45-0.12%
202536,960-46-0.12%
202437,0062940.8%
202336,712460.13%
202236,666-277-0.75%
202136,943-244-0.66%
202037,187-81-0.22%
201938,463-95-0.25%
201838,55880.02%
201738,5501450.38%
201638,4053000.79%
201538,1055281.41%
201437,5774561.23%
201337,1213380.92%
201236,7832770.76%
201136,5063560.98%
201036,1503260.91%
200035,8664,05812.76%
199031,8089,22640.86%
198022,5826,07636.81%
197016,5066,90271.87%
19609,6041,33616.16%
19508,26888712.02%
19407,38181212.36%
19306,5692,71170.27%
19203,8581,74382.41%
19102,11573553.26%
19001,380-220-13.75%
18901,6001,040185.71%
187056000%

Median Age

Overall: 42.6 years
Female: 43.9 years
Male: 41.4 years

Martinez Adults

There are 29,598 adults, (6,985 of whom are seniors) in Martinez.

Sex Ratio

Female: 18,313 (49.6%)
Male: 18,590 (50.4%)

Demographics

The racial composition of Martinez includes 63.14% White, 10.18% Asian, 4.62% other race, and smaller percentages for Black or African American, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White23,30263.14%
Two or more races6,95918.86%
Asian3,75710.18%
Other race1,7064.62%
Black or African American8332.26%
Native American3460.94%
Race
Population ↓
Percentage (of total)
Two or more races3,96210.74%
White1,5564.22%
Other race1,5334.15%
Native American3190.86%
Asian790.21%
Black or African American200.05%
Race
Population ↓
Percentage (of total)
White21,74658.93%
Asian3,6789.97%
Two or more races2,9978.12%
Black or African American8132.2%
Other race1730.47%
Native American270.07%

Martinez Marital Status

Economics and Income Statistics

Martinez 's average per capita income is $85,208. Household income levels show a median of $127,355. The poverty rate stands at 6.31%.

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$168,912-
Families$151,684$176,983
Households$127,355$157,161
Non Families$86,235$110,125

$85,208

Average Income

$127,355

Median Household Income

6.31%

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)