Discovery Bay ZIP Codes — Contra Costa County, CA

There is one unique ZIP code in Discovery Bay, California and it is 94505. Area code: 925.

ZIP codes

16.67

sq mi land

5.79

sq mi water

925

area code

Discovery Bay, CA ZIP code map

About Discovery Bay, CA

Discovery Bay, California, is a small but vibrant community located in Contra Costa County. Known for its waterfront living and beautiful natural surroundings, this city offers a unique blend of residential charm and recreational opportunities. With a strong sense of community, Discovery Bay is a delightful place for families and individuals seeking an active lifestyle.

Location & geography

Situated in Northern California, Discovery Bay covers a land area of 16.67 square miles, along with an additional 5.79 square miles of water. It is located near neighboring cities such as Brentwood, which is approximately 10 miles to the east, and Oakley, about 7 miles to the southeast. The terrain features a mix of residential areas and waterways, providing numerous options for water-based recreational activities.

Community & economy

The character of Discovery Bay is shaped by its close-knit community and outdoor lifestyle. Residents often engage in various activities, including boating, fishing, and enjoying local parks. This community has a diverse range of industries, including retail and services that cater to both the local population and tourism.

Transportation

Discovery Bay is conveniently accessible via State Route 4, which connects travelers to larger cities such as Antioch and Brentwood. The nearest significant airport is the San Francisco International Airport, located about 60 miles away, providing extensive flight options for residents and visitors. Public transportation options are limited, making personal vehicles the most common mode of transit.

History

Discovery Bay was developed in the mid-20th century, primarily as a planned community for waterfront living. The area initially focused on tourism and recreational activities, with many homes being built along its picturesque marinas and waterways. Over time, it has evolved into a desirable residential area while still retaining its recreational charm.

Did you know?

A little-known fact about Discovery Bay is that it was originally part of a larger planned community initiative to build a series of lakeside homes. Additionally, the city's picturesque scenery and recreational waterways have made it a popular location for boating enthusiasts and nature lovers alike.

ZIP codes for Discovery Bay, CA (1)

ZIP code	City	County	Map
94505	Discovery Bay	Contra Costa	View map

Demographics & statistics

15,445

Population

44.0

Median age

$147,292

Median household income

$62,223

Per capita income

$768,200

Median home value

$2,859

Median monthly rent

89.9%

Home ownership

6.1%

Poverty rate

5.4%

Unemployment

5,449

Housing units

31.2%

Bachelor's or higher

Age distribution

Male Female

470

Under 5

466

431

5–9

429

454

10–14

450

616

15–19

611

374

20–24

371

874

25–34

867

776

35–44

771

1,269

45–54

1,261

520

55–59

516

601

60–64

597

759

65–74

754

447

75–84

444

159

85+

158

← Male

Female →

Age summary

Group	Count	%
Under 18	3,405	22.0%
18 and over	12,040	78.0%
65 and over	2,721	17.6%
Median age	44.0 years

Race & ethnicity

White 64.5%

Hispanic or Latino 9.6%

Two or more races 9.3%

Asian 6.7%

Black or African American 4.8%

Other race 4.4%

American Indian / Alaska Native 0.6%

Native Hawaiian / Pacific Islander 0.1%

Group	Count	%
White	11,019	64.5%
Hispanic or Latino	1,637	9.6%
Two or more races	1,596	9.3%
Asian	1,141	6.7%
Black or African American	823	4.8%
Other race	744	4.4%
American Indian / Alaska Native	110	0.6%
Native Hawaiian / Pacific Islander	12	0.1%

Household income

Under $10k 2.8%

$10k–$15k 0.3%

$15k–$25k 3.1%

$25k–$35k 2.9%

$35k–$50k 4.0%

$50k–$75k 5.7%

$75k–$100k 10.3%

$100k–$150k 23.9%

$150k–$200k 13.3%

$200k+ 33.8%

Range	% of households
Under $10k	2.8%
$10k–$15k	0.3%
$15k–$25k	3.1%
$25k–$35k	2.9%
$35k–$50k	4.0%
$50k–$75k	5.7%
$75k–$100k	10.3%
$100k–$150k	23.9%
$150k–$200k	13.3%
$200k+	33.8%
Median income	$147,292

Housing

Home values

Under $50k 0.7%

$50k–$100k 0.3%

$150k–$200k 0.1%

$200k–$300k 0.2%

$300k–$500k 3.2%

$500k–$1M 77.1%

$1M+ 18.4%

Housing overview

Metric	Value
Median home value	$768,200
Median rent / month	$2,859
Owner occupied	89.9%
Renter occupied	10.1%
Vacant	8.7%
Single-family detached	90.9%
Large apartment buildings	1.0%
Mobile homes	0.1%
Median rooms	6.8
Avg household size (owned)	2.76

Year built

Era	%
2020 or later	0.7%
2010–2019	8.8%
2000–2009	31.0%
1990–1999	22.1%
1980–1989	26.3%
1970–1979	8.8%
1960–1969	0.6%
1950–1959	0.2%
1940–1949	0.3%
1939 or earlier	1.1%

Bedrooms

Size	% of units
No bedroom (studio)	0.2%
1 bedroom	0.6%
2 bedrooms	3.9%
3 bedrooms	42.8%
4 bedrooms	39.6%
5+ bedrooms	13.0%

Vehicles per household

Vehicles	% of households
No vehicle	2.4%
1 vehicle	20.5%
2 vehicles	36.1%
3 or more	41.0%

Heating fuel

Fuel type	%
Utility gas	73.9%
Electricity	21.6%
Propane / LP gas	0.5%
Fuel oil	0.1%
Wood	1.1%
Solar	2.7%

Households & families

Household type	Count	%
Married-couple family	3,556	64.9%
Cohabiting couple	353	6.4%
Male householder, no spouse	676	12.3%
Female householder, no spouse	897	16.4%
Households with children under 18	1,947	35.5%
Households with seniors (65+)	1,787	32.6%
Average household size	2.81

Marital status

Status	Male	Female
Never married	27.9%	23.2%
Married	62.4%	59.5%
Separated	0.4%	1.3%
Widowed	2.7%	3.6%
Divorced	6.5%	12.4%

Education

Less than 9th grade 0.5%

Some HS, no diploma 4.3%

HS graduate 19.6%

Some college, no degree 30.0%

Associate's degree 14.4%

Bachelor's degree 22.0%

Graduate / professional 9.2%

Metric	%
HS diploma or higher	95.2%
Bachelor's or higher	31.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	299	8.4%
Kindergarten	150	4.2%
Elementary school	1,208	34.1%
High school	983	27.8%
College / grad school	899	25.4%

Employment

Industry of employment

Education & healthcare 18.4%

Construction 14.2%

Professional & management 12.9%

Retail trade 11.5%

Finance & real estate 10.6%

Public administration 7.7%

Arts, food & hospitality 5.5%

Manufacturing 5.0%

Other services 4.9%

Transportation & utilities 3.9%

Wholesale trade 3.6%

Information 1.1%

Agriculture & mining 0.8%

Occupation

Category	%
Management, business & arts	45.1%
Service	14.2%
Sales & office	27.0%
Natural resources & construction	8.1%
Production & transportation	5.6%

Employment type

Type	%
Private sector	80.5%
Government	14.9%
Self-employed	4.5%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	67.4%
Carpool	12.1%
Public transit	1.1%
Walk	1.3%
Other means	3.1%
Avg commute (minutes)	44.0

Poverty

All people 6.1%

Under 18 years 10.8%

18 and over 4.8%

Married-couple families 2.2%

Female-led households 14.6%

Income support

Source	% of households
Social Security	33.0%
Retirement income	31.5%
Supplemental Security	2.8%
Cash public assistance	3.0%
Food stamps / SNAP	5.2%

Health indicators

Condition	%
High blood pressure	26.3%
High cholesterol	30.0%
Heart disease	5.0%
Stroke	2.3%
Asthma	9.8%
Arthritis	22.0%
Kidney disease	2.4%
Pulmonary disease	5.5%
Cancer	6.0%

Behavior / access	%
Binge drinking	20.0%
No physical activity	17.1%
Less than 7 hrs sleep	31.2%
Fair or poor health	11.7%
Poor mental health	14.2%
Poor physical health	9.2%
No health insurance	8.7%
Visited doctor (checkup)	64.7%
Visited dentist	71.0%
Cholesterol screening	92.2%
Teeth loss	7.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	780	6.5%

Disability	%
Any disability	10.9%
Under 18	3.6%
18–64 years	9.7%
65 and over	24.3%

Health insurance coverage

Type	%
Private insurance	84.2%
Public insurance	27.2%
Uninsured under 19	9.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	14,509	93.9%
Spanish	273	1.9%
Other Indo-European	146	1.0%
Asian & Pacific Islander	40	0.3%
Other languages	87	0.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	14,013	90.7%
Born in same state	13,931	90.2%
Born in different state	10,837	70.2%
Foreign born	82	0.5%
Naturalized citizen	1,432	9.3%
Not a US citizen	1,032	72.1%

Ancestry

Ancestry	Count	%
Italian	1,852	12%
French	1,462	9.5%
Arab	375	2.4%
English	324	2.1%

Ancestry	Count	%
Polish	303	2%
Dutch	40	0.3%
German	27	0.2%
Norwegian	8	0.1%

Technology access

Metric	% of households
Computer access	35.5%
Internet access	99.4%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Discovery Bay, CA have?

Discovery Bay, CA has one ZIP code: 94505. Each ZIP code serves a distinct delivery area within the city and surrounding region.