Contra Costa County, California Population 2023

1,200,997

Contra Costa County, California's estimated 2023 population is 1,200,997 with a growth rate of 0.98% in the past year according to the most recent United States census data. Contra Costa County, California is the 9th largest county in California. The 2010 population was 1,049,025 and has seen a growth of 14.49% since that time.

Note: data after 2021 is projected based on recent change

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Year
Population
Growth
Growth Rate
20101,049,025
20111,060,71511,6901.11%
20121,072,40511,6901.1%
20131,084,09511,6901.09%
20141,095,78511,6901.08%
20151,107,47511,6901.07%
20161,119,16511,6901.06%
20171,130,85511,6901.04%
20181,142,54511,6901.03%
20191,154,23511,6901.02%
20201,165,92711,6921.01%
20211,177,61711,6901%
20221,189,30711,6900.99%
20231,200,99711,6900.98%
showing: 14 rows
2023 Growth Rate
0.98% (11,690)
County Website
Contra Costa County
County Seat
Martinez
2010 Population
1,049,025
Growth Since 2010
14.49% (151,972)

Contra Costa County, California Population 2023

Population by Race

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Race
Population
Percentage (of total)
White580,52349.97%
Asian206,91817.81%
Other race136,20311.73%
Two or more races124,32110.7%
Black or African American100,2608.63%
Native American7,8070.67%
Native Hawaiian or Pacific Islander5,6110.48%
showing: 7 rows

White

Asian

Other race

Two or more races

Black or African American

Native American

Native Hawaiian or Pacific Islander

Contra Costa County, California Population by Race

Contra Costa County, California Population Pyramid 2023

Contra Costa County, California Median Age

39.9

Total

38.8

Male

41

Female

Contra Costa County, California Adults

There are 898,135 adults, (184,031 of whom are seniors) in Contra Costa County, California.

Contra Costa County, California Age Dependency

62.7

Age Dependency Ratio

25.8

Old Age Dependency Ratio

36.9

Child Dependency Ratio

Contra Costa County, California Sex Ratio

Female590,63750.84%
Male571,00649.16%

Contra Costa County, California Population by Age

Contra Costa County, California Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All405,1062.846733
Married221,6473.4578.221.8
Non Family114,0181.3256.343.7
Female49,0443.4147.652.4
Male20,3973.465248
showing: 5 rows

3.33

Average Family Size

2.84

Average Household Size

67.0%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Contra Costa County, California Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Contra Costa County, California Educational Attainment by Sex (over 25)

Contra Costa County, California Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among white people with a rate of 87.71%.

The highest rate of bachelors degrees is among asian people with a rate of 52.93%.

Contra Costa County, California Educational Attainment by Race

All

Male

Female

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$60,853

Average Earnings

$71,161

Average Male

$50,567

Average Female

Contra Costa County, California Earnings by Educational Attainment

Contra Costa County, California Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Contra Costa County, California Language

64.24% of Contra Costa County, California residents speak only English, while 35.76% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 18.37% of the population.

Contra Costa County, California Language

Contra Costa County, California Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
Hispanic301,24734,77811.54%
White480,22026,2735.47%
Other134,61718,42213.68%
Black98,81613,51613.68%
Asian206,06613,0916.35%
Multiple123,50711,7319.5%
Native7,7035326.91%
Islander5,5055069.19%
showing: 8 rows

8.2%

Overall Poverty Rate

7.42%

Male Poverty Rate

8.96%

Female Poverty Rate

Poverty in Contra Costa County, California

The race most likely to be in poverty in Contra Costa County, California is Other, with 13.68% below the poverty level.

The race least likely to be in poverty in Contra Costa County, California is White, with 5.47% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.41%. Among those working part-time, it was 8.78%, and for those that did not work, the poverty rate was 14.99%.

Contra Costa County, California Poverty

rate

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Rate
Poverty
Less Than 9th Grade16.37%
High School10.25%
Some College7.55%
Bachelors or Greater3.53%
showing: 4 rows

Contra Costa County, California Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed24.52%
Male Unemployed18.41%
Female Employed3.89%
Male Employed3.07%
showing: 4 rows

Contra Costa County, California Poverty Rate by Employment Status and Sex

Contra Costa County, California Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Contra Costa County, California Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

51.9%

Overall Marriage Rate

54.2%

Male Marriage Rate

49.6%

Female Marriage Rate

Contra Costa County, California Married by Age and Sex

male

female

Contra Costa County, California Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 45-54.

Contra Costa County, California Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Contra Costa County, California Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

42,638

Number of Veterans

38,904

Male Veterans

3,734

Female Veterans

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Contra Costa County, California Veterans by War

count

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Contra Costa County, California Veterans by Age

count

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Contra Costa County, California Veterans by Race

Contra Costa County, California Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

5.41%

Veteran Poverty Rate

30.6%

Veteran Disability Rate

Contra Costa County, California Veterans by Education

LaborForceParticipation

65.2%

Labor Force Participation

61.3%

Employment Rate

5.8%

Unemployment Rate

Contra Costa County, California Employment by Age

LaborForceParticipation

Contra Costa County, California Employment by Race

LaborForceParticipation

Contra Costa County, California Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

56.82%

Born in Contra Costa County, California

75.64%

Native Born

25.16%

Foreign Born

10.72%

Non Citizen

14.45%

Naturalized

Place of Birth

75.64% of Contra Costa County, California residents were born in the United States, with 56.82% having been born in California. 10.72% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Contra Costa County, California Place of Birth

Sources