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COUNTY · 2000 CENSUS

Contra Costa County

California · 948,816 residents · 717 sq mi
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The short version

With 948,816 people, Contra Costa County is a county in California. Median home value sits at $253,800. That is roughly 34% ahead of the California median. 35% of adults hold a bachelor's degree or higher. Median household income runs $63,675, well clear of the $42,589 US median. Median rent is $898 a month.

At a glance
Wealthier
above the US median
US median: $42,589
Mid-age
median age 36.4
US median: 35.2
More educated
35% hold a bachelor's degree
US average: 24%
More affordable
home values down 11%, inflation adjusted
US median home: $120,530
Section 01

Population & growth

Total population
948,816
+18%since 1990
from 803,732 in 1990
1990 – 2025
Median age
36.4
+6%since 1990
from 34.2 in 1990
US average: 35.2
Land area
717 sq mi
Population, 1990 – 2024
768K876K985K1.1M1.2M19902000201020202024Contra Costa County
20241.2M
1990201020202024
Age distribution, 2000
Under 57%(66,128)
US avg: 6.8%
5 to 97.7%(73,031)
US avg: 7.3%
10 to 147.6%(72,017)
US avg: 7.3%
15 to 196.7%(63,124)
US avg: 7.2%
20 to 245.3%(50,696)
US avg: 6.7%
25 to 3413.3%(126,387)
US avg: 14.2%
35 to 4417.3%(163,755)
US avg: 16%
45 to 5415%(141,988)
US avg: 13.4%
55 to 648.9%(84,418)
US avg: 8.6%
65 to 745.8%(54,722)
US avg: 6.5%
75 to 844.1%(39,179)
US avg: 4.4%
85 and over1.4%(13,371)
US avg: 1.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$63,675
+7%inflation adjusted, since 1990
from $45,087 in 1990
US average: $42,589
1990 – 2024
Per capita income
$30,615
+48%since 1990
from $20,748 in 1990
US average: $21,522
Poverty rate
7.6%
+0.3 ptssince 1990
from 7.3% in 1990
US average: 12.4%
Section 03

Housing

Median home value
$253,800
−11%inflation adjusted, since 1990
from $217,100 in 1990
US average: $120,530
1990 – 2024
Median gross rent
$898
+1%inflation adjusted, since 1990
from $675 in 1990
US average: $602
Owner-occupied
69.3%
+1.7 ptssince 1990
from 67.6% in 1990
30.7% rent
Section 04

Race & ethnicity

1990
White, non-Hispanic76.1%(611,700)
Black9.2%(74,316)
Hispanic / Latino11.2%(90,266)
Asian9.6%(76,854)
2000
White, non-Hispanic57.9%(549,409)
Black9.2%(86,851)
Hispanic / Latino17.7%(167,776)
Asian10.8%(102,681)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

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)
Section 05

Education

Bachelor's degree or higher
35.0%
+3.4 ptssince 1990
from 31.6% in 1990
US average: 24.4%
High school or higher
86.9%
+0.4 ptssince 1990
from 86.5% in 1990
US average: 80.3%
Graduate degree
12.2%
+1.5 ptssince 1990
from 10.6% in 1990
US average: 8.8%
Section 06

Commute & transportation

Average commute
26.9 min
−4%since 1990
from 28.0 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status
Men 15+
Never married28.7%(101,464)
Married60.8%(214,999)
Widowed2.3%(8,202)
Divorced8.2%(29,009)
Women 15+
Never married23%(88,368)
Married56%(214,676)
Widowed9.2%(35,188)
Divorced11.8%(45,387)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
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+103%
Home value$1,090,100+330%
Population1,636,630+40%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
Solano County
Income$100,401+58%
Home value$617,700+143%
Population455,376−61%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
San Joaquin County
Income$92,179+45%
Home value$530,700+109%
Population823,815−30%
SEE FULL COMPARISON →
CONTRA COSTA COUNTY VS
San Mateo County
Income$158,855+149%
Home value$1,559,600+514%
Population743,568−36%
SEE FULL COMPARISON →
Frequently asked

How many people live in Contra Costa County, California?

Contra Costa County, California has about 948,816 residents according to the 2000 Census.

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

The typical household in Contra Costa County, California earns about $63,675 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 $253,800, and the typical rent is about $898 a month.

How educated are people in Contra Costa County, California?

About 35.0% 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 7.6% 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 145,084 residents, a change of about 18 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 →