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COUNTY

Contra Costa County

California · 1,170,070 residents (2025 est.) · 716.896 sq mi
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Notable rankings
#7Highest median rentof 3,137$2,375#22Most expensive homesof 3,139$866,800#36Highest median household incomeof 3,143$127,229#41Largest by populationof 3,1441,170,070
The short version

Contra Costa County is significantly wealthier than the US average, with a median household income of $127,229. Population has grown 23% since 2000. 45% of adults hold a bachelor's degree or higher. Median home value has roughly tripled since 2000, reaching $866,800. It ranks in the top 1% of US counties for household income. Households here earn about 28% more than the California median.

At a glance
Wealthier
above the US median
US median: $82,259
Mid-age
median age 40.5
US median: 38.9
More educated
45% hold a bachelor's degree
US average: 36%
Less affordable
home values up 87%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
1,165,012
+23%since 2000
from 948,816 in 2000
1990 – 2025
Population density
1,625 / sq mi
+15%since 2009
from 1,417 / sq mi in 2009
US average: 281
Median age
40.5
+11%since 2000
from 36.4 in 2000
US average: 38.9

PEP 2025 EST:1,170,070 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
768K876K985K1.1M1.2M1990201020202024Contra Costa County
20241.2M
1990201020202024
Age distribution, 2024
Under 55.3%(61,924)
US avg: 5.6%
5 to 95.9%(68,647)
US avg: 6%
10 to 146.6%(76,963)
US avg: 6.4%
15 to 196.5%(75,592)
US avg: 6.6%
20 to 245.6%(65,734)
US avg: 6.5%
25 to 3412.2%(142,103)
US avg: 13.7%
35 to 4414.2%(164,897)
US avg: 13.2%
45 to 5413.6%(157,936)
US avg: 12.2%
55 to 6413%(151,946)
US avg: 12.7%
65 to 749.9%(115,711)
US avg: 10.2%
75 to 845.2%(60,475)
US avg: 5.1%
85 and over2%(23,084)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$127,229
+10%inflation adjusted, since 2000
from $63,675 in 2000
US average: $82,259
1990 – 2024
Per capita income
$62,927
+106%since 2000
from $30,615 in 2000
US average: $44,673
Households earning $100K+
70.5%
+18.9 ptssince 2009
from 51.6% in 2009
US average: 53.3%
Poverty rate
8.4%
+0.7 ptssince 2000
from 7.6% in 2000
US average: 12.5%
Income inequality (Gini)
0.471
+4%since 2010
from 0.453 in 2010
US average: 0.476
Workforce by industry, 2024
Information10.3%
US avg: 10.8%
Wholesale trade7.8%
US avg: 6.9%
Other services7.4%
US avg: 6.7%
Retail trade6.2%
US avg: 9.9%
Finance & insurance5.7%
US avg: 5.9%
Public administration5.2%
US avg: 4.8%
Professional, scientific, technical4.6%
US avg: 5.1%
Arts, entertainment, food2.5%
US avg: 1.9%
Transportation & warehousing1.8%
US avg: 2.2%
Education & health services1.1%
US avg: 0.9%
Agriculture, forestry, fishing0.6%
US avg: 1.6%
Construction0.5%
US avg: 1.2%
Manufacturing0.1%
US avg: 0.4%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$866,800
+87%inflation adjusted, since 2000
from $253,800 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$2,375
+45%inflation adjusted, since 2000
from $898 in 2000
US average: $1,442
Owner-occupied
68.0%
−1.3 ptssince 2000
from 69.3% in 2000
32.0% rent
Vacancy rate
3.5%
−3.4 ptssince 2009
from 6.9% in 2009
US average: 10.0%
Owner cost-burdened
30.7%
−14.0 ptssince 2009
from 44.7% in 2009
US average: 22.9%
Renter cost-burdened
53.4%
+0.7 ptssince 2009
from 52.7% in 2009
US average: 47.4%
Afford Score
6.8
−8%since 2009
from 7.4 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
Gentrification Score
58
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
RELATED:See current rent listings in Contra Costa County on RentDataNow
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%
2024
White, non-Hispanic38.1%(443,990)
Black7.9%(92,564)
Hispanic / Latino27.6%(321,749)
Asian18.6%(217,115)
Other7.7%(89,594)
Diversity Score
91
+11%since 2009
from 83 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Segregation Score
39
−6%since 2020
from 41 in 2020
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
Mexican18.1%(210,573)
Salvadoran2.6%(30,002)
South American1.5%(18,014)
Guatemalan1.1%(12,405)
Nicaraguan0.9%(10,212)
Peruvian0.8%(8,875)
Puerto Rican0.7%(8,022)
Spaniard0.7%(7,847)
Honduran0.3%(3,330)
Colombian0.3%(3,046)
Cuban0.2%(2,137)
+ 10 more hispanic origin groups with data
Venezuelan0.1%(1,388)
Ecuadorian0.1%(1,323)
Chilean0.1%(1,253)
Costa Rican0.1%(1,153)
Argentine0.1%(1,016)
Panamanian0.1%(1,012)
Dominican0.1%(873)
Bolivian0.1%(600)
Uruguayan0%(226)
Asian origin
Filipino5%(58,399)
Chinese4.4%(51,719)
Asian Indian3.8%(44,704)
Korean0.9%(9,963)
Vietnamese0.8%(9,855)
Japanese0.6%(7,495)
Pakistani0.4%(5,220)
Kazakh0.4%(4,676)
Taiwanese0.3%(3,576)
Nepalese0.3%(3,205)
Laotian0.2%(2,265)
Thai0.1%(1,142)
+ 12 more asian origin groups with data
Mien0.1%(1,088)
Cambodian0.1%(1,003)
Indonesian0.1%(962)
Mongolian0.1%(927)
Sri Lankan0.1%(665)
Burmese0.1%(621)
Malaysian0%(343)
Hmong0%(209)
Bhutanese0%(86)
Uzbek0%(21)
Pacific Islander origin
Native Hawaiian0.3%(3,512)
Samoan0.3%(3,466)
Fijian0.2%(1,837)
Tongan0.1%(1,140)
Chamorro0.1%(1,054)
Guamanian0%(179)
Ancestry
English8%(93,319)
German8%(93,147)
Irish7.3%(84,598)
Italian4.7%(54,679)
American2.2%(25,207)
French1.5%(17,741)
Scottish1.5%(17,621)
Portuguese1.3%(15,421)
Polish1.3%(14,615)
Subsaharan African1.2%(13,465)
Arab1.1%(13,128)
Norwegian1.1%(12,293)
+ 49 more ancestry groups with data
Swedish0.9%(10,910)
Russian0.9%(10,634)
Iranian0.8%(8,957)
Dutch0.6%(7,249)
Scotch-Irish0.6%(7,177)
Danish0.5%(6,032)
British0.5%(5,679)
Ukrainian0.5%(5,553)
Welsh0.4%(5,206)
Greek0.4%(4,896)
Nigerian0.3%(4,047)
Brazilian0.3%(3,375)
French Canadian0.3%(2,947)
Czech0.3%(2,920)
Swiss0.2%(2,865)
Hungarian0.2%(2,829)
West Indian0.2%(2,325)
Armenian0.2%(2,211)
Finnish0.2%(1,925)
Austrian0.2%(1,815)
Egyptian0.2%(1,808)
Canadian0.1%(1,570)
Lebanese0.1%(1,395)
Croatian0.1%(1,369)
Lithuanian0.1%(1,318)
Jamaican0.1%(1,282)
Turkish0.1%(1,270)
Romanian0.1%(1,244)
Bulgarian0.1%(1,107)
Ethiopian0.1%(1,075)
Slovak0.1%(965)
Palestinian0.1%(941)
Belgian0.1%(737)
Jordanian0.1%(645)
Israeli0.1%(619)
Australian0.1%(610)
Kenyan0.1%(607)
Ghanaian0.1%(595)
Serbian0%(504)
Latvian0%(474)
Slovene0%(440)
Syrian0%(429)
Haitian0%(408)
Moroccan0%(363)
Iraqi0%(194)
Guyanese0%(167)
Barbadian0%(54)
RANKED:Largest Mexican population · Largest English population · Largest German population · Largest Irish population · Largest Filipino population
Section 05

Education

Bachelor's degree or higher
45.2%
+10.2 ptssince 2000
from 35.0% in 2000
US average: 35.6%
High school or higher
89.6%
+2.7 ptssince 2000
from 86.9% in 2000
US average: 89.6%
Graduate degree
17.7%
+5.6 ptssince 2000
from 12.2% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
35.3 min
+31%since 2000
from 26.9 min in 2000
US average: 26.5
Drive alone to work
59.7%
−10.7 ptssince 2009
from 70.3% in 2009
US average: 68.9%
Carpooled to work
10.0%
−2.2 ptssince 2009
from 12.2% in 2009
US average: 8.5%
Public transit
5.4%
−3.5 ptssince 2009
from 8.9% in 2009
US average: 3.2%
Worked from home
21.3%
+16.2 ptssince 2009
from 5.0% in 2009
US average: 15.0%
Walked to work
1.8%
+0.1 ptssince 2009
from 1.8% in 2009
US average: 2.4%
Biked to work
0.4%
−0.2 ptssince 2009
from 0.6% in 2009
US average: 0.4%
No vehicle available
5.2%
−0.3 ptssince 2009
from 5.5% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
6.5%
−3.0 ptssince 2011
from 9.5% in 2011
US average: 5.2%
Labor force participation
64.7%
−1.3 ptssince 2011
from 66.0% in 2011
US average: 63.5%
Self-employed
14.1%
+0.9 ptssince 2009
from 13.2% in 2009
US average: 13.1%
Management & professional
48.1%
−18.5 ptssince 2009
from 66.6% in 2009
US average: 42.5%
Section 08

People & community

Male
49.2%
Unchangedsince 2009
from 49.2% in 2009
Female
50.8%
Unchangedsince 2009
from 50.8% in 2009
Foreign born
26.6%
+3.4 ptssince 2009
from 23.1% in 2009
US average: 14.1%
Veterans
4.2%
−44.4 ptssince 2009
from 48.5% in 2009
US average: 6.2%
With a disability
11.1%
+1.3 ptssince 2012
from 9.8% in 2012
US average: 13.3%
Uninsured
4.6%
−83.5 ptssince 2013
from 88.1% in 2013
US average: 8.4%
Broadband at home
95.6%
+7.4 ptssince 2017
from 88.2% in 2017
US average: 91.0%
English only at home
62.5%
−3.1 ptssince 2016
from 65.5% in 2016
US average: 77.7%
Spanish at home
19.1%
+1.3 ptssince 2016
from 17.9% in 2016
US average: 13.6%
Marital status
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
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Head to head

Compare Contra Costa County to nearby counties

CONTRA COSTA COUNTY VS
Alameda County
Income$129,367+2%
Home value$1,090,100+26%
Population1,636,630+40%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
Solano County
Income$100,401−21%
Home value$617,700−29%
Population455,376−61%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
San Joaquin County
Income$92,179−28%
Home value$530,700−39%
Population823,815−30%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
San Mateo County
Income$158,855+25%
Home value$1,559,600+80%
Population743,568−36%
SEE FULL COMPARISON →
Frequently asked

How many people live in Contra Costa County, California?

Contra Costa County, California has about 1,165,012 residents according to the 2024 American Community Survey.

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

The typical household in Contra Costa County, California earns about $127,229 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 $866,800, and the typical rent is about $2,375 a month.

How educated are people in Contra Costa County, California?

About 45.2% 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 8.4% 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 361,280 residents, a change of about 45 percent over that period.

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Explore from here

242 census tracts (top 20 by population)
Census Tract 3551.15Census Tract 3032.07Census Tract 3031.06Census Tract 3032.02Census Tract 3552.01Census Tract 3820Census Tract 3020.14Census Tract 3451.12Census Tract 3031.07Census Tract 3320Census Tract 3770Census Tract 3790Census Tract 3080.01Census Tract 3462.04Census Tract 3452.03Census Tract 3690.01Census Tract 3310Census Tract 3142Census Tract 3342Census Tract 3050
43 ZIP codes (top 30 by population)
ZIP 94565ZIP 94509ZIP 94513ZIP 94806ZIP 94553ZIP 94582ZIP 94531ZIP 94561ZIP 94804ZIP 94521ZIP 94583ZIP 94520ZIP 94523ZIP 94801ZIP 94526ZIP 94549ZIP 94803ZIP 94518ZIP 94598ZIP 94506ZIP 94530ZIP 94547ZIP 94596ZIP 94597ZIP 94563ZIP 94519ZIP 94564ZIP 94595ZIP 94556ZIP 94505
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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