Port Costa Flag

Port Costa

County Seat:
No
Area (mi²):
0.158
State:
California

Port Costa is a CDP located in Contra Costa County, California. Port Costa has a 2025 population of 266. Port Costa is currently growing at a rate of 1.92% annually and its population has increased by 9.92% since the most recent census, which recorded a population of 242 in 2020.

The average household income in Port Costa is $49,289 with a poverty rate of 0%.The median age in Port Costa is 68.5 years: 77 years for males, and 67.1 years for females.

266
Total Population
1,681
Density (mi²)
5 1.92%
Growth

Port Costa Population

Port Costa Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Port Costa includes 84.02% White, 9.79% other race, and smaller percentages for and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White16384.02%
Other race199.79%
Two or more races126.19%

Port Costa Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Port Costa's average per capita income is $0. Household income levels show a median of $0. The poverty rate stands at 0%.

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
Non Families$29,274$35,910
Households-$49,289
Families--
Married Families--

$0

Average Income

$0

Median Household Income

0%

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)