Antioch ZIP Code List — Contra Costa County, CA

There are 2 unique ZIP codes in Antioch, California. Area code: 925.

ZIP codes

31.47

sq mi land

0.23

sq mi water

925

area code

Antioch, CA ZIP code map

About Antioch, CA

Antioch, California, is a vibrant city located in the heart of Contra Costa County. With a rich history and diverse community, Antioch offers a mix of urban and suburban living. The city has become a popular destination for families and individuals looking for a welcoming place to call home.

Location & geography

Antioch is situated in the eastern part of the San Francisco Bay Area, approximately 30 miles northeast of San Francisco. It is bordered by neighboring cities such as Pittsburg to the north, Oakley to the east, and Brentwood to the south, providing residents with easy access to various amenities. The city encompasses a total land area of 31.47 square miles, with a modest water area of 0.23 square miles, highlighting its blend of land and water features.

Community & economy

The character of Antioch is shaped by its diverse population and thriving community spirit, making it a dynamic place to live. The local economy is supported by various industries, including retail, healthcare, and education, which provide numerous job opportunities for residents. Daily life in Antioch often revolves around community events, local parks, and the scenic waterfront, providing a balance between work and leisure.

Transportation

Major highways such as State Route 4 and Highway 160 provide convenient access to Antioch, connecting it to the broader Bay Area. The nearest airport is the Buchanan Field Airport located in Concord, CA, while the city is also serviced by local bus and transit systems that facilitate travel throughout the region. Residents benefit from a network of thoroughfares and public transport options that make commuting and exploring the area easier.

History

Antioch was founded in the 1850s and quickly developed into a key center for agriculture and shipping in the region. Throughout its history, the city has adapted to changing economic trends, with notable growth during the post-World War II era as people moved to the suburbs. Antioch has also been significant in California's transportation history, serving as a hub for the construction of various railroads and highways.

Did you know?

One little-known fact about Antioch is that it was named after Antioch, Syria, reflecting the city’s founder's admiration for the ancient city. Additionally, Antioch is home to one of the largest marinas in the region, providing residents with recreational activities and access to the Sacramento-San Joaquin River Delta.

ZIP codes for Antioch, CA (2)

ZIP code	City	County	Map
94509	Antioch	Contra Costa	View map
94531	Antioch	Contra Costa	View map

Demographics & statistics

115,004

Population

37.4

Median age

$92,701

Median household income

$37,508

Per capita income

$570,550

Median home value

$2,406

Median monthly rent

63.8%

Home ownership

11.4%

Poverty rate

7.7%

Unemployment

23,398

Housing units

24.2%

Bachelor's or higher

Age distribution

Male Female

3,373

Under 5

3,724

3,333

5–9

3,681

3,656

10–14

4,038

4,063

15–19

4,487

3,538

20–24

3,908

7,781

25–34

8,592

7,265

35–44

8,024

6,571

45–54

7,256

4,000

55–59

4,418

3,716

60–64

4,103

4,932

65–74

5,446

1,768

75–84

1,952

655

85+

724

← Male

Female →

Age summary

Group	Count	%
Under 18	27,344	23.5%
18 and over	87,660	76.6%
65 and over	15,477	13.4%
Median age	37.4 years

Race & ethnicity

White 27.2%

Hispanic or Latino 19.8%

Black or African American 15.7%

Other race 13.5%

Asian 11%

Two or more races 10.8%

Native Hawaiian / Pacific Islander 1%

American Indian / Alaska Native 1%

Group	Count	%
White	38,989	27.2%
Hispanic or Latino	28,377	19.8%
Black or African American	22,446	15.7%
Other race	19,409	13.5%
Asian	15,781	11%
Two or more races	15,483	10.8%
Native Hawaiian / Pacific Islander	1,464	1%
American Indian / Alaska Native	1,432	1%

Household income

Under $10k 2.6%

$10k–$15k 2.6%

$15k–$25k 4.2%

$25k–$35k 6.4%

$35k–$50k 9.6%

$50k–$75k 12.5%

$75k–$100k 13.9%

$100k–$150k 19.4%

$150k–$200k 12.1%

$200k+ 17.0%

Range	% of households
Under $10k	2.6%
$10k–$15k	2.6%
$15k–$25k	4.2%
$25k–$35k	6.4%
$35k–$50k	9.6%
$50k–$75k	12.5%
$75k–$100k	13.9%
$100k–$150k	19.4%
$150k–$200k	12.1%
$200k+	17.0%
Median income	$92,701

Housing

Home values

Under $50k 0.8%

$50k–$100k 1.3%

$100k–$150k 0.9%

$150k–$200k 1.8%

$200k–$300k 3.1%

$300k–$500k 25.4%

$500k–$1M 64.8%

$1M+ 2.1%

Housing overview

Metric	Value
Median home value	$570,550
Median rent / month	$2,406
Owner occupied	63.8%
Renter occupied	36.2%
Vacant	2.7%
Single-family detached	79.9%
Large apartment buildings	6.7%
Mobile homes	1.0%
Median rooms	6.1
Avg household size (owned)	3.09

Year built

Era	%
2020 or later	1.1%
2010–2019	3.6%
2000–2009	17.6%
1990–1999	27.0%
1980–1989	17.9%
1970–1979	13.6%
1960–1969	7.3%
1950–1959	6.1%
1940–1949	4.1%
1939 or earlier	1.9%

Bedrooms

Size	% of units
No bedroom (studio)	1.7%
1 bedroom	6.4%
2 bedrooms	14.4%
3 bedrooms	36.6%
4 bedrooms	29.5%
5+ bedrooms	11.5%

Vehicles per household

Vehicles	% of households
No vehicle	4.9%
1 vehicle	23.1%
2 vehicles	34.9%
3 or more	37.3%

Heating fuel

Fuel type	%
Utility gas	62.8%
Electricity	29.7%
Propane / LP gas	2.3%
Fuel oil	0.1%
Wood	0.3%
Solar	3.3%
No fuel used	1.6%

Households & families

Household type	Count	%
Married-couple family	17,494	49.4%
Cohabiting couple	2,895	7.8%
Male householder, no spouse	5,571	14.6%
Female householder, no spouse	10,439	28.4%
Households with children under 18	14,147	39.0%
Households with seniors (65+)	11,226	30.6%
Average household size	3.18

Marital status

Status	Male	Female
Never married	41.1%	36.5%
Married	46.7%	42.4%
Separated	1.4%	1.8%
Widowed	2.6%	7.1%
Divorced	8.3%	12.2%

Education

Less than 9th grade 6.4%

Some HS, no diploma 7.5%

HS graduate 26.3%

Some college, no degree 25.3%

Associate's degree 10.6%

Bachelor's degree 17.8%

Graduate / professional 6.5%

Metric	%
HS diploma or higher	86.2%
Bachelor's or higher	24.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	1,291	4.5%
Kindergarten	1,737	5.9%
Elementary school	11,467	38.6%
High school	6,824	23.4%
College / grad school	7,844	27.8%

Employment

Industry of employment

Education & healthcare 24.5%

Professional & management 13.3%

Retail trade 11.3%

Arts, food & hospitality 8.7%

Construction 8.1%

Transportation & utilities 7.6%

Finance & real estate 6.5%

Manufacturing 5.9%

Public administration 5.4%

Other services 5.4%

Information 1.7%

Wholesale trade 1.5%

Agriculture & mining 0.4%

Occupation

Category	%
Management, business & arts	35.0%
Service	22.1%
Sales & office	22.7%
Natural resources & construction	8.9%
Production & transportation	11.4%

Employment type

Type	%
Private sector	77.3%
Government	15.8%
Self-employed	6.7%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	65.4%
Carpool	13.3%
Public transit	6.9%
Walk	1.5%
Other means	1.8%
Avg commute (minutes)	45.7

Poverty

All people 11.4%

Under 18 years 16.2%

18 and over 9.9%

Married-couple families 4.6%

Female-led households 20.5%

Income support

Source	% of households
Social Security	31.1%
Retirement income	26.2%
Supplemental Security	8.7%
Cash public assistance	5.9%
Food stamps / SNAP	13.0%

Health indicators

Condition	%
High blood pressure	26.8%
High cholesterol	27.2%
Heart disease	4.8%
Stroke	2.7%
Asthma	10.3%
Arthritis	20.3%
Kidney disease	2.6%
Pulmonary disease	5.6%
Cancer	4.8%

Behavior / access	%
Binge drinking	18.2%
No physical activity	22.5%
Less than 7 hrs sleep	34.2%
Fair or poor health	15.6%
Poor mental health	15.4%
Poor physical health	10.4%
No health insurance	13.7%
Visited doctor (checkup)	64.5%
Visited dentist	62.8%
Cholesterol screening	89.7%
Teeth loss	11.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	4,886	5.4%

Disability	%
Any disability	15.0%
Under 18	5.5%
18–64 years	14.0%
65 and over	37.0%

Health insurance coverage

Type	%
Private insurance	65.6%
Public insurance	40.5%
Uninsured under 19	3.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	107,907	93.9%
Spanish	15,163	14.1%
Other Indo-European	9,340	8.0%
Asian & Pacific Islander	1,271	1.4%
Other languages	4,415	4.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	89,153	77.2%
Born in same state	87,333	75.6%
Born in different state	71,820	61.7%
Foreign born	1,820	1.6%
Naturalized citizen	25,851	22.9%
Not a US citizen	15,404	61.4%

Ancestry

Ancestry	Count	%
Italian	5,899	5.1%
French	4,365	3.8%
Arab	2,121	1.8%
Polish	897	0.8%
English	432	0.4%

Ancestry	Count	%
German	221	0.2%
Dutch	192	0.2%
Irish	136	0.1%
Norwegian	42	0%

Technology access

Metric	% of households
Computer access	31.4%
Internet access	97.5%

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

Frequently asked questions

What ZIP codes does Antioch, CA have?

Antioch, CA has 2 ZIP codes: 94509, 94531. Each ZIP code serves a distinct delivery area within the city and surrounding region.

What is the main ZIP code for Antioch, CA?

The primary ZIP code for Antioch, CA is 94509. The city uses area code 925 for phone service.

What county is Antioch, CA in?

Antioch is located in Contra Costa County, California.

How many ZIP codes are in Antioch, CA?

Antioch, CA has 2 ZIP codes.

What ZIP code covers downtown Antioch and the historic waterfront area along the San Joaquin River?

Downtown Antioch, including the riverfront district and Main Street area, is primarily served by ZIP code 94509.

Which ZIP code serves the Antioch Marina and the Delta Waterways residential neighborhoods?

The Antioch Marina area and nearby Delta Waterways communities are located in ZIP code 94531.