Discovery Bay is an unincorporated community in Contra Costa County, CA. It has no city government: the county runs it, and the Census counts it as its own place.

About

Life in Discovery Bay

This is a commuter's community built on a unique premise: waterfront living with private dock access to the Delta, about an hour from San Francisco. The original development was planned around man-made waterways and residential islands, giving the older sections a distinctive character that newer subdivisions spreading across former farmland to the north and west don't quite replicate. The cost of living is steep: median home values hover around $832,000 and median rent runs $3,029 monthly, which tracks with the median household income of $147,117.

Discovery Bay at a Glance

Population, income, housing and more

Median Age

45.6 yrs

Poverty Rate

7.4%

Foreign-Born

12.2%

Broadband Internet

98.1%

of households

Population Growth

-5.7%

recent change · Census Bureau

Median household income

Discovery Bay$147,117
California avg$99,122
US$80,734

Demographics12.2% foreign-born, most often from Mexico

Who lives in Discovery Bay: race and ethnicity, ages, households, languages and countries of origin

In Discovery Bay, the largest foreign-born group is from Mexico (23.2%), and 6.5% of residents speak Spanish at home.

Under 18

22.5%

of residents

65 and Older

19.1%

of residents

Households with Kids

33.0%

anyone under 18

Living Alone

19.3%

of households

Married Couples

60.7%

of households

Avg Household Size

2.74

people

Race & Ethnicity

White55.6%
Hispanic or Latino19.2%
Black8.2%
Two or more races7.2%
Asian7.0%
Pacific Islander0.5%

Hispanic or Latino of any race; other groups are non-Hispanic

Top countries of origin (foreign-born)

Mexico23.2%
Philippines12.6%
Pakistan8.6%
Venezuela7.6%
Russia5.0%
India4.2%
Poland4.0%
Haiti3.6%
Costa Rica3.0%
Nigeria2.8%

Languages Spoken at Home

English only86.4%
Spanish6.5%
Other Indo-European1.9%
Russian/Slavic1.5%
French/Haitian1.5%
Tagalog/Filipino0.8%
Chinese0.5%
Other Asian/Pacific0.5%

Cost of Livingrent 49% above CA average

Rent, home values, and income in Discovery Bay

In Discovery Bay, rent runs 49% above the CA average, and home values are 13% above the CA average.

Median rent (per month)

Discovery Bay$3,029
California avg$2,036
US$1,413

Median home value

Discovery Bay$832,000
California avg$734,700
US$332,700

Rent Burdened

71.8%

spending 30%+ of income on rent

Severely Rent Burdened

54.6%

spending 50%+

Cost of Living Index

115.6

metro area (BEA) · US avg = 100

Median Property Tax

$7,976

per year, owner-occupied homes

Homeowners

90.1%

of occupied homes are owned

Typical Home Built

1995

median year built

Vacant Homes

10.4%

of housing units

Home Value Trend

$808,528
$875,598
$775,031
202120222023202420252026

Latest: $775,031 (September 2026)

Jobs & Economyunemployment 0.7 pts below CA average

Unemployment in Discovery Bay

Unemployment in Contra Costa County, which includes Discovery Bay, is 0.7 percentage points lower than the CA average.

Unemployment rate

Discovery Bay4.8%
California avg5.5%
US4.3%

Discovery Bay: Contra Costa County rate (county-wide) · BLS annual average

Unemployment Rate — 10 Year Trend

4.4%
3.7%
3.1%
3%
8.7%
6.1%
3.4%
3.9%
4.5%
4.8%
2016201720182019202020212022202320242025

Contra Costa County (county-wide) · Annual averages

Discovery Bay is about 1% of Contra Costa County’s population, so county-wide figures may differ from local conditions.

What Discovery Bay Residents Do for Work · share of employed residents by industry

Professional & business services18.5%
Education & health care16.3%
Construction12.8%
Retail8.8%
Transportation & utilities8.7%
Public administration7.7%
Finance & real estate7.2%
Manufacturing7.0%

City residents, wherever they work

Commute44.1 min avg

How Discovery Bay residents get to work, and the nearest airports

In Discovery Bay, most residents drive alone to work (66%), and 35% get there in under 30 minutes.

How People Get to Work

Drive alone66.2%
Carpool9.2%
Public transit0.2%
Walk0.5%
Work from home22.3%
Other1.7%

Commute Time Distribution

Under 15 min12.7%
15–29 min22.0%
30–44 min24.1%
45–59 min10.6%
60+ min30.5%

Nearest airports · with airline service

  • Stockton Metropolitan Airport (SCK)

    Regional airport · few flights66k passengers boarded in 2025

    20 mi
  • Oakland San Francisco Bay Airport (OAK)

    Medium hub4.5M passengers boarded in 2025

    36 mi
  • San Francisco International Airport (SFO)

    Major hub26.3M passengers boarded in 2025

    46 mi

Straight-line distance. Size is the FAA’s hub category, based on passenger traffic: regional airports may have only a few flights a day.

Safetyviolent crime 24% below national average

Crime rates for 2025

Violent crime in the area policed by the Contra Costa County Sheriff's Office, which covers Discovery Bay, runs 24% below the national average.

Violent Crime Rate

251.8

per 100,000 residents

Below average (329 national, 2025)

Property Crime Rate

928.9

per 100,000 residents

Below average (1,552 national, 2025)

Policed by Contra Costa County Sheriff's Office (county-wide rate)

Natural DisastersStrong Wind most common — 10 events in 2025

Natural hazard risk, storms and earthquakes

FEMA National Risk Index

Very High

99.5 / 100

Compares expected losses from natural hazards, social vulnerability and community resilience against every US county (higher = more risk).

Inland flooding · Very HighDrought · HighEarthquake · HighHeat wave · HighLandslide · High

Contra Costa County, county-wide · FEMA NRI December 2025

In Contra Costa County, which includes Discovery Bay, the most common type is strong wind, with 10 recorded events in 2025.

Most common events:

Strong WindFloodHigh WindWildfireHeat

Storm events by year

YearEventsTop TypeProperty Damage
202510FloodNone reported
202411Flood$70
20239High WindNot estimated
202212Strong Wind$10
202112Strong WindNot estimated
202018Strong WindNone reported
201932Strong WindNone reported
201816FloodNone reported

Property damage is the National Weather Service's estimate filed with each event. “None reported” means the events were logged with $0 damage; “Not estimated” means no estimate was filed. Storms covering several counties aren't counted here, since NOAA doesn't split their damage by county.

290 earthquakes of magnitude 2.5+ within 100 miles in the past year

Contra Costa County, county-wide

Discovery Bay is about 1% of Contra Costa County’s population, so county-wide figures may differ from local conditions.

Air Quality48 median AQI — Good

Days by air quality category (2024)

Air quality in Contra Costa County, which includes Discovery Bay, is typically good — 195 good-air days per year.

Median AQI

48

Good Days

195

per year

Moderate Days

168

per year

Unhealthy Days

0

per year

Contra Costa County, county-wide

Discovery Bay is about 1% of Contra Costa County’s population, so county-wide figures may differ from local conditions.

Climate91°F summers, 42°F winters

30-year climate averages (1991–2020) — monthly temperatures and precipitation

Discovery Bay has hot summers (avg high 91°F) and mild winters (avg low 42°F).

Spring (Mar–May)

74°/51°F

avg high / low

Summer (Jun–Aug)

91°/61°F

avg high / low

Fall (Sep–Nov)

78°/54°F

avg high / low

Winter (Dec–Feb)

58°/42°F

avg high / low

Annual Precipitation

12.4"

Annual Snowfall

0.0"

Hot Days/Year

82

days above 90°F

Freeze Days/Year

10

days below 32°F

Rainy Days/Year

61

Average month

High °FLow °FPrecip (in)
30°50°70°90°110°3"Jan: 2.51" precipitationFeb: 2.32" precipitationMar: 1.60" precipitationApr: 0.84" precipitationMay: 0.52" precipitationJun: 0.13" precipitationJul: 0.00" precipitationAug: 0.01" precipitationSep: 0.08" precipitationOct: 0.67" precipitationNov: 1.32" precipitationDec: 2.37" precipitationJJan: high 56°F, low 41°FFFeb: high 62°F, low 44°FMMar: high 67°F, low 47°FAApr: high 73°F, low 50°FMMay: high 80°F, low 55°FJJun: high 88°F, low 59°F93°JJul: high 93°F, low 62°FAAug: high 93°F, low 62°FSSep: high 89°F, low 60°FOOct: high 79°F, low 55°FNNov: high 66°F, low 46°F40°DDec: high 57°F, low 40°F
Show month-by-month table ↓
MonthHighLowPrecip
Jan56°F41°F2.51"
Feb62°F44°F2.32"
Mar67°F47°F1.60"
Apr73°F50°F0.84"
May80°F55°F0.52"
Jun88°F59°F0.13"
Jul93°F62°F0.00"
Aug93°F62°F0.01"
Sep89°F60°F0.08"
Oct79°F55°F0.67"
Nov66°F46°F1.32"
Dec57°F40°F2.37"

Healthcare

Hospitals, ratings, and health insurance in Discovery Bay

Uninsured

5.8%

of residents

No hospitals inside Discovery Bay's limits — nearest hospitals · within 15 miles

Kaiser Foundation Hospital - Antioch

Acute Care Hospitals · ER available · 9.9 mi away · Antioch

Sutter Delta Medical Center

Acute Care Hospitals · ER available · 12.2 mi away · Antioch

Sutter Tracy Community Hospital

Acute Care Hospitals · ER available · 14.4 mi away · Tracy

Adult Health · vs. the typical US place

Obesity29.8%US 36.8%
Diabetes10.5%US 12.6%
High blood pressure32.0%US 37.1%
Current smoking10.3%US 15.0%
No leisure-time physical activity21.4%US 26.6%
Depression22.0%US 23.0%
Asthma10.3%US 10.7%
Routine checkup in past year73.0%US 78.2%

Share of adults. Modeled estimates, not counted cases. “US” = the typical US place.

Medicare-certified hospitals only. Doesn’t include clinics, urgent care, or freestanding ERs.

Education22.6:1 student/teacher ratio

Schools and degree attainment in Discovery Bay

Discovery Bay's student/teacher ratio is 22.6:1 (higher than the national average of 16:1), and 32.7% of adults 25+ hold a bachelor's degree or higher.

Public Schools

3

within city limits

Private Schools

1

within city limits

College Degree Rate

32.7%

adults 25+ with bachelor's or higher

Student/Teacher Ratio

22.6:1

National avg 16:1

Schools located within city limits (2023) — school-level metrics change slowly year to year

Parks & Recreationclosest: Eugene O'Neill National Historic Site, 24 mi

Nearby national parks, recreation areas and public libraries for Discovery Bay

Discovery Bay has 8 nearby national parks or recreation areas, closest being Eugene O'Neill National Historic Site (24 mi away).

Nearby National Parks & Recreation Areas

Eugene O'Neill National Historic Site

National Historic Site

24 mi away

Port Chicago Naval Magazine National Memorial

National Memorial

26 mi away

John Muir National Historic Site

National Historic Site

29 mi away

Rosie the Riveter WWII Home Front National Historical Park

National Historical Park

41 mi away

Alcatraz Island

National Park Site

45 mi away

San Francisco Maritime National Historical Park

National Historical Park

45 mi away

Fort Point National Historic Site

National Historic Site

48 mi away

Presidio of San Francisco

National Park Site

48 mi away

Cities Near Discovery Bay

The closest cities within 60 miles

Planning a move to Discovery Bay?

Read our full moving guide — what it's really like to live here.

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Discovery Bay FAQ

Is Discovery Bay, California affordable?⌄

Discovery Bay's median rent is $3,029/month, which is significantly above the national average. The median household income is $147,117/year. Median home value is $832,000.

Is Discovery Bay, California safe?⌄

Discovery Bay is policed by the Contra Costa County Sheriff's Office, whose violent crime rate across its service area was 252 per 100,000 residents in 2025, which is below the national average of 329/100k that year. Property crime rate is 929 per 100,000. As with any city, crime rates vary by neighborhood.

What is the job market like in Discovery Bay, California?⌄

Contra Costa County, which includes Discovery Bay, has an unemployment rate of 4.8%, which is slightly above the national average of 4.3%.

What is the cost of living in Discovery Bay, California?⌄

The cost of living in Discovery Bay is primarily driven by housing. Median rent is $3,029/month and median household income is $147,117/year. The median home value is $832,000. About 72% of renters spend more than 30% of their income on housing.

How is the commute in Discovery Bay, California?⌄

The average commute in Discovery Bay is 44 minutes, which is significantly longer than average compared to the national average of 26 minutes.

Data from the US Census Bureau, BLS, FBI, NOAA, EPA, Zillow Research and other public sources. Where our data comes from