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World Population Review
Contra Costa County, California Population 2021
Contra Costa County, California's estimated population is 1,159,540 with a growth rate of 0.26% in the past year according to the most recent United States census data. Contra Costa County, California is the 10th largest county in California. The 2010 Population was 1,052,540 and has seen a growth of 10.17% since this time.
Note: 2020 and 2021 data is projected
| Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2021 | 1,159,540 | 3,010 | 0.26% |
| 2020 | 1,156,530 | 3,000 | 0.26% |
| 2019 | 1,153,530 | 3,010 | 0.26% |
| 2018 | 1,150,520 | 4,980 | 0.43% |
| 2017 | 1,145,540 | 8,270 | 0.73% |
| 2016 | 1,137,270 | 12,870 | 1.14% |
| 2015 | 1,124,400 | 15,520 | 1.40% |
| 2014 | 1,108,880 | 15,480 | 1.42% |
| 2013 | 1,093,400 | 15,850 | 1.47% |
| 2012 | 1,077,550 | 12,110 | 1.14% |
| 2011 | 1,065,440 | 12,900 | 1.23% |
| 2010 | 1,052,540 | 248,808 | 30.96% |
| 1990 | 803,732 | 147,352 | 22.45% |
| 1980 | 656,380 | 97,991 | 17.55% |
| 1970 | 558,389 | 149,359 | 36.52% |
| 1960 | 409,030 | 110,046 | 36.81% |
| 1950 | 298,984 | 198,534 | 197.64% |
| 1940 | 100,450 | 21,842 | 27.79% |
| 1930 | 78,608 | 24,719 | 45.87% |
| 1920 | 53,889 | 22,215 | 70.14% |
| 1910 | 31,674 | 13,628 | 75.52% |
| 1900 | 18,046 | 4,531 | 33.53% |
| 1890 | 13,515 | 990 | 7.90% |
| 1880 | 12,525 | 4,064 | 48.03% |
| 1870 | 8,461 | 3,133 | 58.80% |
| 1860 | 5,328 | 0.00% |
2021 Growth Rate
0.26%
County Website
State
County Seat
Lat./Long.
2010 Population
1,052,540
Growth Since 2010
10.17%
Contra Costa County, California Population Growth
| Race | Population | Percentage |
|---|---|---|
| White | 637,904 | 55.85% |
| Asian | 190,983 | 16.72% |
| Some Other Race | 124,629 | 10.91% |
| Black or African American | 99,642 | 8.72% |
| Two or More Races | 77,956 | 6.82% |
| Native Hawaiian and Other Pacific Islander | 5,631 | 0.49% |
| American Indian and Alaska Native | 5,506 | 0.48% |
Contra Costa County, California Population by Race
Contra Costa County, California Population Pyramid $2021
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Contra Costa County, California Population by Age
Contra Costa County, California Households and Families
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 394,769 | 2.87 | 65.9 |
| Married | 217,370 | 3.45 | 77.1 |
| Non Family | 109,963 | 1.32 | 54.4 |
| Female | 48,256 | 3.52 | 47.5 |
| Male | 19,180 | 3.55 | 52 |
3.35
Average Family Size
2.87
Average Household Size
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Contra Costa County, California Households by Type
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| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 44,393 | 5.64% |
| 9th to 12th Grade | 38,528 | 4.89% |
| High School Graduate | 135,825 | 17.25% |
| Some College | 168,811 | 21.45% |
| Associates Degree | 66,223 | 8.41% |
| Bachelors Degree | 206,622 | 26.25% |
| Graduate Degree | 126,776 | 16.11% |
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Contra Costa County, California Educational Attainment by Sex (over 25)
Contra Costa County, California Educational Attainment by Race
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| Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 382,807 | 370,462 | 195,792 |
| Hispanic | 168,367 | 118,026 | 28,817 |
| Asian | 139,449 | 126,853 | 79,328 |
| Other Race | 72,541 | 46,597 | 8,219 |
| Black | 67,308 | 61,883 | 18,236 |
| 2+ Races | 34,805 | 31,680 | 12,638 |
| Native American | 3,867 | 3,065 | 684 |
| Islander | 3,665 | 3,012 | 660 |
The highest rate of high school graduation is among white people with a rate of 96.78%.
The highest rate of bachelors degrees is among asian people with a rate of 56.89%.
Contra Costa County, California Educational Attainment by Race
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$54,396
Average Earnings
$64,594
Average Male
$45,951
Average Female
Contra Costa County, California Earnings by Educational Attainment
Contra Costa County, California Language by Age
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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 18.32% of the population.
Contra Costa County, California Language
Contra Costa County, California Poverty by Race
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| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| Hispanic | 289,643 | 37,524 | 12.96% |
| White | 497,062 | 26,560 | 5.34% |
| Other | 123,357 | 20,177 | 16.36% |
| Black | 98,077 | 16,065 | 16.38% |
| Asian | 190,045 | 11,744 | 6.18% |
| Multiple | 77,147 | 8,713 | 11.29% |
| Native | 5,415 | 437 | 8.07% |
| Islander | 5,557 | 281 | 5.06% |
8.70%
Overall Poverty Rate
7.92%
Male Poverty Rate
9.46%
Female Poverty Rate
Poverty in Contra Costa County, California
The race most likely to be in poverty in Contra Costa County, California is Black, with 16.38% below the poverty level.
The race least likely to be in poverty in Contra Costa County, California is Islander, with 5.06% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.57%. Among those working part-time, it was 10.22%, and for those that did not work, the poverty rate was 15.04%.
Contra Costa County, California Poverty
Contra Costa County, California Poverty Rate by Education
Contra Costa County, California Marital Status
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Marriage Rates
51.8%
Overall Marriage Rate
54.2%
Male Marriage Rate
49.6%
Female Marriage Rate
Contra Costa County, California Married by Age and Sex
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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 35-44.
Contra Costa County, California Marital Status by Race
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Contra Costa County, California Marital Status
Contra Costa County, California Veterans by War
Contra Costa County, California Veterans by Age
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| Name | Veterans | % of Total |
|---|---|---|
| White | 34,328 | 6.72% |
| Black | 5,782 | 7.50% |
| Hispanic | 4,753 | 2.37% |
| Asian | 3,379 | 2.21% |
| 2+ Races | 1,943 | 4.43% |
| Other Race | 1,103 | 1.26% |
| Native American | 224 | 5.12% |
| Islander | 209 | 4.87% |
Contra Costa County, California Veterans by Race
Contra Costa County, California Veterans by Education
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4.34%
Veteran Poverty Rate
30.01%
Veteran Disability Rate
Contra Costa County, California Veterans by Education
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64.8%
Labor Force Participation
61.3%
Employment Rate
5.3%
Unemployment Rate
Contra Costa County, California Employment by Age
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Contra Costa County, California Employment by Race
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Contra Costa County, California Employment by Education
Origin of Non-Citizens
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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Origin of Naturalized Citizens
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74.60%
Native Born
25.40%
Foreign Born
11.52%
Non Citizen
13.89%
Naturalized
Place of Birth
74.60% of Contra Costa County, California residents were born in the United States, with 55.33% having been born in California. 11.52% 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
- US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- Population of States and Counties of the United States: 1790 - 1990