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COUNTY · 2010 ACS

Contra Costa County

California · 1,049,025 residents · 717 sq mi
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The short version

Contra Costa County is a county of 1,049,025 people in California. Home values have more than doubled since 2000, reaching $548,200. 38% of adults hold a bachelor's degree or higher. Median household income runs $78,385, well clear of the $52,703 US median. 24% of locals were born outside the United States. Households here earn about 29% more than in California as a whole.

At a glance
Wealthier
above the US median
US median: $52,703
Mid-age
median age 38.5
US median: 37.2
More educated
38% hold a bachelor's degree
US average: 28%
Less affordable
home values up 71%, inflation adjusted
US median home: $225,659
Section 01

Population & growth

Total population
1,049,025
+11%since 2000
from 948,816 in 2000
1990 – 2025
Median age
38.5
+6%since 2000
from 36.4 in 2000
US average: 37.2
Land area
717 sq mi
Population, 1990 – 2024
768K876K985K1.1M1.2M19902000201020202024Contra Costa County
20241.2M
1990201020202024
Age distribution, 2010
Under 56.4%(67,018)
US avg: 6.5%
5 to 96.9%(72,285)
US avg: 6.6%
10 to 147.1%(74,444)
US avg: 6.7%
15 to 197%(73,766)
US avg: 7.1%
20 to 245.7%(59,943)
US avg: 7%
25 to 3412.4%(129,643)
US avg: 13.3%
35 to 4414.2%(148,650)
US avg: 13.3%
45 to 5415.6%(164,080)
US avg: 14.6%
55 to 6412.3%(128,758)
US avg: 11.8%
65 to 746.7%(70,719)
US avg: 7%
75 to 843.8%(40,347)
US avg: 4.2%
85 and over1.8%(19,372)
US avg: 1.8%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$78,385
−3%inflation adjusted, since 2000
from $63,675 in 2000
US average: $52,703
1990 – 2024
Per capita income
$37,818
+24%since 2000
from $30,615 in 2000
US average: $27,286
Households earning $100K+
52.0%
+0.3 ptssince 2009
from 51.6% in 2009
US average: 33.3%
Poverty rate
9.0%
+1.4 ptssince 2000
from 7.6% in 2000
US average: 13.8%
Income inequality (Gini)
0.453
US average: 0.461
Workforce by industry, 2010
Information11.3%
US avg: 11.5%
Other services10.1%
US avg: 7%
Wholesale trade7.8%
US avg: 7.2%
Retail trade7.5%
US avg: 10.9%
Public administration7.3%
US avg: 4.9%
Finance & insurance5.2%
US avg: 5.1%
Professional, scientific, technical4.1%
US avg: 4.2%
Arts, entertainment, food3.1%
US avg: 2.4%
Transportation & warehousing2.9%
US avg: 3.1%
Education & health services1.1%
US avg: 0.9%
Agriculture, forestry, fishing0.5%
US avg: 1.9%
Construction0.4%
US avg: 1.4%
Manufacturing0.1%
US avg: 0.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$548,200
+71%inflation adjusted, since 2000
from $253,800 in 2000
US average: $225,659
1990 – 2024
Median gross rent
$1,270
+12%inflation adjusted, since 2000
from $898 in 2000
US average: $853
Owner-occupied
67.1%
−2.2 ptssince 2000
from 69.3% in 2000
32.9% rent
Vacancy rate
7.2%
+0.4 ptssince 2009
from 6.9% in 2009
US average: 12.1%
Persons per household
2.75 people
Unchangedsince 2009
from 2.75 people in 2009
US average: 2.60
Owner cost-burdened
44.6%
−0.1 ptssince 2009
from 44.7% in 2009
US average: 30.9%
Renter cost-burdened
52.5%
−0.2 ptssince 2009
from 52.7% in 2009
US average: 46.8%
Afford Score
7.0
−5%since 2009
from 7.4 in 2009
2009 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Section 04

Race & ethnicity

2000
White, non-Hispanic57.9%(549,409)
Black9.2%(86,851)
Hispanic / Latino17.7%(167,776)
Asian10.8%(102,681)
Other0%
2010
White, non-Hispanic47.8%(500,923)
Black8.9%(93,604)
Hispanic / Latino24.4%(255,560)
Asian14.2%(148,881)
Other4.4%(46,394)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican16.8%(171,731)
Central American3.4%(34,424)
Salvadoran1.9%(19,006)
South American1%(10,338)
Nicaraguan0.6%(6,636)
Puerto Rican0.6%(5,767)
Guatemalan0.6%(5,647)
Peruvian0.5%(5,170)
Spaniard0.4%(4,599)
Cuban0.2%(1,683)
Colombian0.1%(1,442)
Costa Rican0.1%(1,228)
+ 10 more hispanic origin groups with data
Argentine0.1%(1,039)
Chilean0.1%(830)
Honduran0.1%(757)
Ecuadorian0.1%(587)
Bolivian0%(455)
Panamanian0%(343)
Venezuelan0%(333)
Dominican0%(173)
Uruguayan0%(59)
Ancestry
German11.6%(119,356)
Irish9.8%(100,252)
English8.8%(89,726)
Italian6.1%(62,794)
French2.6%(26,695)
American2.4%(24,136)
Portuguese2.2%(22,363)
Scottish2.1%(21,135)
Swedish1.6%(16,741)
Scotch-Irish1.5%(15,795)
Polish1.5%(15,430)
Norwegian1.5%(15,334)
+ 51 more ancestry groups with data
Subsaharan African1.5%(15,309)
Russian1.4%(13,869)
Dutch1.3%(13,682)
Danish0.8%(7,841)
Iranian0.7%(7,236)
Welsh0.7%(6,915)
Arab0.7%(6,803)
British0.6%(5,885)
Greek0.5%(5,414)
Hungarian0.4%(4,201)
Swiss0.4%(4,083)
Czech0.3%(3,368)
French Canadian0.3%(3,263)
Ukrainian0.3%(2,994)
Austrian0.3%(2,778)
Finnish0.3%(2,582)
Armenian0.2%(2,362)
West Indian0.2%(2,326)
Brazilian0.2%(2,272)
Canadian0.2%(2,155)
Lithuanian0.2%(1,904)
Nigerian0.2%(1,821)
Croatian0.2%(1,562)
Romanian0.1%(1,517)
Ethiopian0.1%(1,360)
Palestinian0.1%(1,274)
Lebanese0.1%(1,235)
Egyptian0.1%(1,064)
Jamaican0.1%(1,035)
Belgian0.1%(993)
Slovak0.1%(881)
Australian0.1%(743)
Bulgarian0.1%(623)
Latvian0.1%(609)
Israeli0.1%(607)
Serbian0%(511)
Turkish0%(480)
Kenyan0%(374)
Moroccan0%(291)
Iraqi0%(282)
Syrian0%(277)
Slovene0%(242)
Haitian0%(183)
Guyanese0%(161)
Jordanian0%(157)
Ghanaian0%(150)
Barbadian0%(117)
Somali0%(37)
Section 05

Education

Bachelor's degree or higher
38.2%
+3.2 ptssince 2000
from 35.0% in 2000
US average: 27.9%
High school or higher
88.4%
+1.5 ptssince 2000
from 86.9% in 2000
US average: 84.9%
Graduate degree
13.7%
+1.5 ptssince 2000
from 12.2% in 2000
US average: 10.2%
Section 06

Commute & transportation

Average commute
32.0 min
+19%since 2000
from 26.9 min in 2000
US average: 25.2
Drive alone to work
70.0%
−0.3 ptssince 2009
from 70.3% in 2009
US average: 76.2%
Carpooled to work
12.0%
−0.2 ptssince 2009
from 12.2% in 2009
US average: 10.4%
Public transit
8.9%
Unchangedsince 2009
from 8.9% in 2009
US average: 4.7%
Worked from home
5.6%
+0.5 ptssince 2009
from 5.0% in 2009
US average: 4.1%
Walked to work
1.7%
Unchangedsince 2009
from 1.8% in 2009
US average: 2.8%
Biked to work
0.6%
+0.1 ptssince 2009
from 0.6% in 2009
US average: 0.5%
No vehicle available
5.5%
Unchangedsince 2009
from 5.5% in 2009
US average: 8.7%
Section 07

Work & employment

Self-employed
13.5%
+0.2 ptssince 2009
from 13.2% in 2009
US average: 12.9%
Management & professional
41.3%
+0.7 ptssince 2009
from 40.5% in 2009
US average: 35.2%
Section 08

People & community

Male
48.8%
−0.4 ptssince 2009
from 49.2% in 2009
Female
51.2%
+0.4 ptssince 2009
from 50.8% in 2009
Foreign born
23.6%
+0.5 ptssince 2009
from 23.1% in 2009
US average: 12.8%
Veterans
8.3%
−0.3 ptssince 2009
from 8.6% in 2009
US average: 9.9%
Marital status (2024)
Men 15+
Never married35.6%(166,385)
Married55.4%(259,034)
Widowed2.2%(10,463)
Divorced6.7%(31,356)
Women 15+
Never married30.5%(149,517)
Married51.3%(251,660)
Widowed7.2%(35,410)
Divorced10.9%(53,653)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured
4.6%
−7.3 ptssince 2013
from 11.9% in 2013
US average: 8.4%
Employer-based
62.9%
−0.5 ptssince 2020
from 63.4% in 2020
US average: 54.8%
Direct-purchase
13.8%
−0.5 ptssince 2020
from 14.3% in 2020
US average: 13.8%
Medicare
17.4%
+0.9 ptssince 2020
from 16.5% in 2020
US average: 18.4%
Medicaid
19.9%
+1.6 ptssince 2020
from 18.3% in 2020
US average: 20.9%
VA health care
1.4%
+0.1 ptssince 2020
from 1.3% in 2020
US average: 2.2%
Any private
73.5%
−1.4 ptssince 2020
from 74.9% in 2020
US average: 67.1%
Any public
34.6%
+2.2 ptssince 2020
from 32.4% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)21.3%(8,071)
US avg: 26.4%
Gulf War (1990s)17.1%(6,494)
US avg: 24.3%
Vietnam era35.4%(13,420)
US avg: 33.1%
Korean War6.6%(2,497)
US avg: 4.5%
World War II1.2%(439)
US avg: 1%

Share of the 37,905 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper

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Head to head

Compare Contra Costa County to nearby counties

CONTRA COSTA COUNTY VS
Alameda County
Income$129,367+65%
Home value$1,090,100+99%
Population1,636,630+40%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
Solano County
Income$100,401+28%
Home value$617,700+13%
Population455,376−61%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
San Joaquin County
Income$92,179+18%
Home value$530,700−3%
Population823,815−30%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
San Mateo County
Income$158,855+103%
Home value$1,559,600+184%
Population743,568−36%
SEE FULL COMPARISON →
Frequently asked

How many people live in Contra Costa County, California?

Contra Costa County, California has about 1,049,025 residents according to the 2010 American Community Survey.

What is the median household income in Contra Costa County, California?

The typical household in Contra Costa County, California earns about $78,385 a year. Half of households make more than that, and half make less.

Is Contra Costa County, California expensive?

In Contra Costa County, California, the median home is worth about $548,200, and the typical rent is about $1,270 a month.

How educated are people in Contra Costa County, California?

About 38.2% of adults age 25 and over in Contra Costa County, California hold a bachelor's degree or higher.

What is the poverty rate in Contra Costa County, California?

About 9.0% of people in Contra Costa County, California live below the federal poverty line.

Has Contra Costa County, California grown since 1990?

Yes, Contra Costa County, California has grown since 1990. The population has added about 245,293 residents, a change of about 31 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →