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COUNTY · 2000 CENSUS

Contra Costa County

California · 948,816 residents · 716.896 sq mi
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The short version

Contra Costa County is significantly wealthier than the US average, with a median household income of $63,675. Population has grown 18% since 1990. 35% of adults hold a bachelor's degree or higher, well above the national rate of 24%. Median home value is $253,800. Households here earn about 34% more than the California median.

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
Population density
1,324 / sq mi
+18%since 1990
from 1,121 / sq mi in 1990
US average: 242
Median age
36.4
+6%since 1990
from 34.2 in 1990
US average: 35.2
Population, 1990 – 2024
768K876K985K1.1M1.2M1990201020202024Contra Costa County
20241.2M
1990201020202024
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
Afford Score
4.0
−17%since 1990
from 4.8 in 1990
1990 – 2024
RELATED:See current rent listings in Contra Costa County on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic76.1%(611,700)
Black9.2%(74,316)
Hispanic / Latino11.2%(90,266)
Asian9.6%(76,854)
Diversity Score63.2%(507,602)
2000
White, non-Hispanic57.9%(549,409)
Black9.2%(86,851)
Hispanic / Latino17.7%(167,776)
Asian10.8%(102,681)
Diversity Score72.1%(683,869)
Diversity Score
72
+14%since 1990
from 63 in 1990
1990 – 2024
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.

Drill deeper

Places similar to Contra Costa County

Montgomery County
Pop 1,074,582
Collin County
Pop 1,297,179
Bergen County
Pop 977,026
Westchester County
Pop 1,015,743
Places similar to Contra Costa County
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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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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