Port Costa, California Population & Demographics

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Statistic	Port Costa	California	National
Population	251	40,994,941	336,919,644
Population density (sq mi)	1,585	263	91
Median age	65.3	36.0	37.7
Male/Female ratio	2.2:1	1.0:1	1.0:1
Married (15yrs & older)	53%	52%	55%
Families w/ Kids under 18	0%	46%	43%
Speak English	83%	56%	79%
Speak Spanish	17%	29%	13%

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Carquinez Scenic Dr

Port Costa, CA

Demographics Quick Facts

The population density in Port Costa is 502% higher than California
The median age in Port Costa is 81% higher than California
In Port Costa 93.39% of the population is White
In Port Costa 0.00% of the population is Black
In Port Costa 0.00% of the population is Asian

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Port Costa racial demographics

Race	Port Costa	California	National
White	93.39%	61.26%	73.35%
Black	0.00%	5.85%	12.63%
Asian	0.00%	13.85%	5.22%
American Indian	0.00%	0.74%	0.82%
Native Hawaiian	0.00%	0.39%	0.18%
Mixed race	0.00%	4.62%	3.06%
Other race	6.61%	13.28%	4.75%

In Port Costa, 6.6% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

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Household income distribution

Place of birth by citizenship

Port Costa age breakdown

Marital status

Age of children in married couples

Source: The Port Costa, CA demographics data displayed above is derived from the United States Census Bureau American Community Survey (ACS) and include 2026 modeled data developed using proprietary methodologies.