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COUNTY · 2020 ACS

Contra Costa County

California · 1,165,927 residents · 717 sq mi
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The short version

Contra Costa County is a county of 1,165,927 people in California. Home values have more than doubled since 2000, reaching $655,500. Renters pay $1,928 a month at the median. Median household income runs $103,997, well clear of the $66,278 US median. Households here earn about 32% more than in California as a whole. 43% of adults hold a bachelor's degree or higher.

At a glance
Wealthier
above the US median
US median: $66,278
Mid-age
median age 40.1
US median: 38.8
More educated
43% hold a bachelor's degree
US average: 33%
Less affordable
home values up 72%, inflation adjusted
US median home: $265,253
Section 01

Population & growth

Total population
1,165,927
+23%since 2000
from 948,816 in 2000
1990 – 2025
Median age
40.1
+10%since 2000
from 36.4 in 2000
US average: 38.8
Land area
717 sq mi
Population, 1990 – 2024
768K876K985K1.1M1.2M19902000201020202024Contra Costa County
20241.2M
1990201020202024
Age distribution, 2020
Under 55.3%(62,032)
US avg: 5.6%
5 to 96.2%(71,913)
US avg: 6.1%
10 to 146.9%(80,309)
US avg: 6.5%
15 to 196.7%(78,206)
US avg: 6.6%
20 to 245.6%(65,602)
US avg: 6.7%
25 to 3412.2%(142,644)
US avg: 13.5%
35 to 4413.8%(160,572)
US avg: 12.7%
45 to 5413.6%(158,157)
US avg: 12.3%
55 to 6413.2%(153,693)
US avg: 13.1%
65 to 749.7%(113,376)
US avg: 10%
75 to 844.9%(56,566)
US avg: 4.9%
85 and over2%(22,857)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$103,997
+9%inflation adjusted, since 2000
from $63,675 in 2000
US average: $66,278
1990 – 2024
Per capita income
$50,118
+64%since 2000
from $30,615 in 2000
US average: $35,364
Households earning $100K+
64.1%
+12.5 ptssince 2009
from 51.6% in 2009
US average: 43.9%
Poverty rate
8.2%
+0.5 ptssince 2000
from 7.6% in 2000
US average: 12.8%
Workforce by industry, 2020
Information10%
US avg: 11.1%
Other services8%
US avg: 6.6%
Wholesale trade7.2%
US avg: 6.7%
Retail trade6.6%
US avg: 10%
Public administration5.5%
US avg: 4.7%
Finance & insurance5.4%
US avg: 5.5%
Professional, scientific, technical4.4%
US avg: 4.7%
Arts, entertainment, food2.5%
US avg: 2%
Transportation & warehousing2.3%
US avg: 2.5%
Education & health services1%
US avg: 0.8%
Agriculture, forestry, fishing0.6%
US avg: 1.7%
Construction0.5%
US avg: 1.2%
Manufacturing0.1%
US avg: 0.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$655,500
+72%inflation adjusted, since 2000
from $253,800 in 2000
US average: $265,253
1990 – 2024
Median gross rent
$1,928
+43%inflation adjusted, since 2000
from $898 in 2000
US average: $1,124
Owner-occupied
65.6%
−3.7 ptssince 2000
from 69.3% in 2000
34.4% rent
Persons per household
2.86 people
+4%since 2009
from 2.75 people in 2009
US average: 2.61
Afford Score
6.3
−15%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%
2020
White, non-Hispanic39.1%(455,421)
Black8.4%(97,994)
Hispanic / Latino27%(314,900)
Asian18.4%(214,520)
Other6.2%(72,625)
Segregation Score
41
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican17.1%(195,933)
Central American4.6%(52,582)
Salvadoran2.6%(30,376)
South American1.4%(15,523)
Puerto Rican0.9%(9,770)
Nicaraguan0.8%(9,638)
Guatemalan0.8%(9,119)
Peruvian0.7%(7,893)
Spaniard0.6%(7,061)
Colombian0.3%(2,985)
Cuban0.2%(2,149)
Honduran0.2%(1,760)
+ 10 more hispanic origin groups with data
Argentine0.1%(1,554)
Chilean0.1%(1,023)
Dominican0.1%(759)
Costa Rican0.1%(715)
Ecuadorian0.1%(711)
Panamanian0.1%(659)
Venezuelan0%(536)
Bolivian0%(507)
Uruguayan0%(149)
Asian origin
Filipino4.5%(51,840)
Chinese4.4%(50,500)
Asian Indian3.2%(36,832)
Korean0.9%(10,588)
Vietnamese0.9%(10,397)
Japanese0.7%(7,689)
Pakistani0.4%(5,161)
Laotian0.4%(4,202)
Taiwanese0.2%(2,394)
Nepalese0.2%(2,244)
Indonesian0.1%(977)
Thai0.1%(891)
+ 8 more asian origin groups with data
Cambodian0.1%(846)
Sri Lankan0.1%(627)
Burmese0%(373)
Hmong0%(234)
Mongolian0%(226)
Bhutanese0%(187)
Malaysian0%(53)
Pacific Islander origin
Native Hawaiian0.3%(3,424)
Samoan0.2%(2,436)
Chamorro0.1%(1,700)
Fijian0.1%(1,669)
Tongan0.1%(1,477)
Ancestry
German8.7%(99,645)
Irish7.9%(91,119)
English7%(80,799)
Italian5.5%(62,642)
American2.5%(29,248)
French2%(22,487)
Portuguese1.5%(17,759)
Scottish1.5%(17,459)
Polish1.4%(16,139)
Norwegian1.3%(14,439)
Swedish1.2%(13,789)
Russian1.1%(13,026)
+ 50 more ancestry groups with data
Dutch0.9%(10,378)
British0.7%(8,294)
Iranian0.7%(7,933)
Scotch-Irish0.7%(7,522)
Welsh0.6%(6,500)
Danish0.5%(5,965)
Greek0.4%(5,116)
Hungarian0.3%(3,903)
Ukrainian0.3%(3,579)
Brazilian0.3%(3,564)
Swiss0.3%(3,452)
French Canadian0.3%(3,223)
Finnish0.3%(3,171)
West Indian0.3%(3,125)
Austrian0.2%(2,768)
Nigerian0.2%(2,672)
Czech0.2%(2,635)
Canadian0.2%(2,393)
Egyptian0.2%(2,386)
Armenian0.2%(2,122)
Turkish0.1%(1,665)
Romanian0.1%(1,584)
Jamaican0.1%(1,574)
Lebanese0.1%(1,499)
Lithuanian0.1%(1,448)
Croatian0.1%(1,319)
Ethiopian0.1%(1,163)
Belgian0.1%(1,111)
Israeli0.1%(973)
Australian0.1%(948)
Palestinian0.1%(918)
Arab0.1%(890)
Slovak0.1%(828)
Jordanian0.1%(740)
Bulgarian0.1%(724)
Haitian0.1%(705)
Serbian0.1%(704)
Kenyan0%(532)
Latvian0%(499)
Syrian0%(474)
Slovene0%(426)
Ghanaian0%(387)
Guyanese0%(203)
Iraqi0%(201)
Moroccan0%(175)
Macedonian0%(111)
Barbadian0%(56)
Section 05

Education

Bachelor's degree or higher
43.3%
+8.3 ptssince 2000
from 35.0% in 2000
US average: 32.9%
High school or higher
89.9%
+3.0 ptssince 2000
from 86.9% in 2000
US average: 88.5%
Graduate degree
16.6%
+4.4 ptssince 2000
from 12.2% in 2000
US average: 12.7%
Section 06

Commute & transportation

Average commute
38.5 min
+43%since 2000
from 26.9 min in 2000
US average: 26.9
Drive alone to work
65.7%
−4.6 ptssince 2009
from 70.3% in 2009
US average: 75.1%
No vehicle available
5.3%
−0.2 ptssince 2009
from 5.5% in 2009
US average: 8.4%
Section 07

Work & employment

Unemployment rate
5.5%
−4.0 ptssince 2011
from 9.5% in 2011
US average: 5.4%
Labor force participation
65.0%
−1.1 ptssince 2011
from 66.0% in 2011
US average: 63.4%
Women 20-64 in the labor force
73.3%
US average: 73.3%
Management & professional
45.6%
+5.1 ptssince 2009
from 40.5% in 2009
US average: 39.3%
Section 08

People & community

Male
48.9%
−0.3 ptssince 2009
from 49.2% in 2009
Female
51.1%
+0.3 ptssince 2009
from 50.8% in 2009
Foreign born
24.8%
+1.7 ptssince 2009
from 23.1% in 2009
US average: 13.5%
Uninsured
5.0%
−6.9 ptssince 2013
from 11.9% in 2013
US average: 8.8%
Computer in household
96.2%
US average: 91.9%
Same house as last year
88.1%
US average: 86.2%
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

Uninsured
5.0%
−6.9 ptssince 2013
from 11.9% in 2013
US average: 8.8%
Employer-based
63.4%
US average: 55.4%
Direct-purchase
14.3%
US average: 13.7%
Medicare
16.5%
US average: 17.6%
Medicaid
18.3%
US average: 20.0%
VA health care
1.3%
US average: 2.3%
Any private
74.9%
US average: 68.1%
Any public
32.4%
US average: 35.2%

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, 2020
Gulf War (2001 or later)13.5%(6,095)
US avg: 20.6%
Gulf War (1990s)17%(7,635)
US avg: 21.4%
Vietnam era36.1%(16,260)
US avg: 35.2%
Korean War10.4%(4,670)
US avg: 7.6%
World War II4.4%(1,974)
US avg: 2.9%

Share of the 45,027 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+24%
Home value$1,090,100+66%
Population1,636,630+40%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
Solano County
Income$100,401−3%
Home value$617,700−6%
Population455,376−61%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
San Joaquin County
Income$92,179−11%
Home value$530,700−19%
Population823,815−30%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
San Mateo County
Income$158,855+53%
Home value$1,559,600+138%
Population743,568−36%
SEE FULL COMPARISON →
Frequently asked

How many people live in Contra Costa County, California?

Contra Costa County, California has about 1,165,927 residents according to the 2020 American Community Survey.

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

The typical household in Contra Costa County, California earns about $103,997 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 $655,500, and the typical rent is about $1,928 a month.

How educated are people in Contra Costa County, California?

About 43.3% 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 8.2% 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 362,195 residents, a change of about 45 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 →