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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.
| 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% |
| 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% |
| 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
| 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% |
| Name | 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 |
| Multiple 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%.
$54,396
Average Earnings
$64,594
Average Male
$45,951
Average Female
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.
| 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
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%.
51.8%
Overall Marriage Rate
54.2%
Male Marriage Rate
49.6%
Female Marriage Rate
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.
| 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 or More | 1,943 | 4.43% |
| Other | 1,103 | 1.26% |
| Indian | 224 | 5.12% |
| Hawaiian | 209 | 4.87% |
4.34%
Veteran Poverty Rate
30.01%
Veteran Disability Rate
64.8%
Labor Force Participation
61.3%
Employment Rate
5.3%
Unemployment Rate
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
74.60%
Native Born
25.40%
Foreign Born
11.52%
Non Citizen
13.89%
Naturalized
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.