Byron ZIP Code List — Contra Costa County, CA

There is one unique ZIP code in Byron, California and it is 94514. Area code: 925.

ZIP codes

30.01

sq mi land

0.20

sq mi water

925

area code

Byron, CA ZIP code map

About Byron, CA

Byron, California is a small, tranquil community located in Contra Costa County. Known for its rural charm and close-knit atmosphere, Byron serves as a peaceful retreat away from the bustling cities of the Bay Area. With its scenic landscapes and open spaces, it offers residents and visitors a glimpse into California's agricultural heritage.

Location & geography

Byron is situated in the eastern part of the San Francisco Bay Area and lies approximately 15 miles northeast of Livermore. The city covers a land area of 30.01 square miles, with an additional water area of 0.20 square miles, featuring a mix of rolling hills and flat farmland. Nearby cities include Brentwood to the south, approximately 8 miles away, Discovery Bay to the west, around 7 miles, and Antioch to the southeast, approximately 10 miles from Byron.

Community & economy

The character of Byron is defined by its friendly residents and a strong sense of community. Primarily an agricultural area, local industries focus on farming and agricultural production, making it a key player in the region's agricultural output. Daily life in Byron often revolves around outdoor activities and community events that celebrate its rural lifestyle.

Transportation

Byron is accessible via State Route 4, which connects it to other parts of Contra Costa County and the greater Bay Area. The nearest major airport is Oakland International Airport, located approximately 40 miles to the southwest, providing residents with convenient travel options.

History

Byron was established in the mid-19th century and has a rich agricultural history that shaped its development. Originally a farming community, it has maintained its agricultural roots over the years. Notable events in Byron’s history include the construction of the Byron Hot Springs, which attracted visitors in the early 1900s for its therapeutic waters.

Did you know?

A surprising fact about Byron is that it features the Byron Hot Springs, a site once famous for its therapeutic waters. This historic location has seen various uses over the years, contributing to the city's unique character and appeal.

ZIP codes for Byron, CA (1)

ZIP code	City	County	Map
94514	Byron	Contra Costa	View map

Demographics & statistics

2,023

Population

39.5

Median age

$72,445

Median household income

$32,214

Per capita income

$764,800

Median home value

$2,336

Median monthly rent

66.1%

Home ownership

10.8%

Poverty rate

8.4%

Unemployment

393

Housing units

19.4%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

100

116

15–19

140

108

20–24

132

25–34

35–44

122

45–54

149

55–59

106

60–64

128

65–74

112

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	438	21.7%
18 and over	1,585	78.3%
65 and over	348	17.2%
Median age	39.5 years

Race & ethnicity

White 50.8%

Hispanic or Latino 22%

Two or more races 13.8%

Other race 8.9%

Asian 2.3%

American Indian / Alaska Native 2.1%

Black or African American 0.1%

Group	Count	%
White	1,317	50.8%
Hispanic or Latino	571	22%
Two or more races	358	13.8%
Other race	232	8.9%
Asian	59	2.3%
American Indian / Alaska Native	54	2.1%
Black or African American	3	0.1%

Household income

Under $10k 3.0%

$15k–$25k 7.5%

$25k–$35k 4.0%

$35k–$50k 3.1%

$50k–$75k 32.6%

$75k–$100k 7.7%

$100k–$150k 14.0%

$150k–$200k 19.5%

$200k+ 8.6%

Range	% of households
Under $10k	3.0%
$15k–$25k	7.5%
$25k–$35k	4.0%
$35k–$50k	3.1%
$50k–$75k	32.6%
$75k–$100k	7.7%
$100k–$150k	14.0%
$150k–$200k	19.5%
$200k+	8.6%
Median income	$72,445

Housing

Home values

Under $50k 10.0%

$100k–$150k 2.4%

$300k–$500k 6.3%

$500k–$1M 45.9%

$1M+ 35.4%

Housing overview

Metric	Value
Median home value	$764,800
Median rent / month	$2,336
Owner occupied	66.1%
Renter occupied	33.9%
Vacant	2.4%
Single-family detached	82.3%
Large apartment buildings	0.0%
Mobile homes	10.1%
Median rooms	5.3
Avg household size (owned)	3.52

Year built

Era	%
2020 or later	0.0%
2010–2019	3.9%
2000–2009	8.7%
1990–1999	9.7%
1980–1989	21.1%
1970–1979	14.1%
1960–1969	7.2%
1950–1959	8.7%
1940–1949	0.0%
1939 or earlier	26.6%

Bedrooms

Size	% of units
No bedroom (studio)	4.3%
1 bedroom	3.4%
2 bedrooms	30.8%
3 bedrooms	33.9%
4 bedrooms	13.8%
5+ bedrooms	13.8%

Vehicles per household

Vehicles	% of households
No vehicle	3.0%
1 vehicle	14.8%
2 vehicles	29.7%
3 or more	52.5%

Heating fuel

Fuel type	%
Utility gas	41.7%
Electricity	35.4%
Propane / LP gas	16.6%
Wood	4.7%

Households & families

Household type	Count	%
Married-couple family	258	45.0%
Cohabiting couple	130	22.7%
Male householder, no spouse	62	10.8%
Female householder, no spouse	123	21.5%
Households with children under 18	170	29.7%
Households with seniors (65+)	245	42.8%
Average household size	3.51

Marital status

Status	Male	Female
Never married	43.0%	52.4%
Married	37.6%	37.7%
Separated	0.0%	2.4%
Widowed	1.1%	2.9%
Divorced	18.3%	4.6%

Education

Less than 9th grade 3.2%

Some HS, no diploma 9.4%

HS graduate 24.5%

Some college, no degree 28.7%

Associate's degree 14.8%

Bachelor's degree 8.3%

Graduate / professional 11.1%

Metric	%
HS diploma or higher	87.4%
Bachelor's or higher	19.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	7	1.1%
Kindergarten	22	3.4%
Elementary school	232	35.6%
High school	176	27.0%
College / grad school	214	32.9%

Employment

Industry of employment

Education & healthcare 22.0%

Construction 20.8%

Arts, food & hospitality 19.3%

Retail trade 13.4%

Transportation & utilities 7.3%

Professional & management 6.5%

Agriculture & mining 4.8%

Manufacturing 1.9%

Finance & real estate 1.7%

Public administration 1.7%

Other services 0.5%

Occupation

Category	%
Management, business & arts	29.9%
Service	16.2%
Sales & office	19.1%
Natural resources & construction	14.6%
Production & transportation	20.2%

Employment type

Type	%
Private sector	71.2%
Government	20.6%
Self-employed	7.0%
Unpaid family workers	1.2%

Commute

Method	%
Drive alone	78.4%
Carpool	15.9%
Public transit	0.0%
Walk	3.1%
Other means	0.0%
Avg commute (minutes)	42.5

Poverty

All people 10.8%

Under 18 years 13.8%

18 and over 10.0%

Married-couple families 3.1%

Female-led households 20.2%

Income support

Source	% of households
Social Security	46.1%
Retirement income	54.3%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
High blood pressure	26.0%
High cholesterol	29.6%
Heart disease	5.3%
Stroke	2.6%
Asthma	10.0%
Arthritis	21.4%
Kidney disease	2.6%
Pulmonary disease	6.1%
Cancer	5.4%

Behavior / access	%
Binge drinking	19.9%
No physical activity	20.9%
Less than 7 hrs sleep	31.6%
Fair or poor health	15.0%
Poor mental health	15.3%
Poor physical health	10.5%
No health insurance	13.8%
Visited doctor (checkup)	63.2%
Visited dentist	64.8%
Cholesterol screening	89.8%
Teeth loss	11.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	79	5.0%

Disability	%
Any disability	22.9%
Under 18	0.0%
18–64 years	26.3%
65 and over	39.1%

Health insurance coverage

Type	%
Private insurance	61.5%
Public insurance	56.0%
Uninsured under 19	0.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,974	97.6%
Spanish	202	10.2%
Other Indo-European	200	10.1%
Asian & Pacific Islander	2	0.1%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,689	83.5%
Born in same state	1,665	82.3%
Born in different state	1,041	51.5%
Foreign born	24	1.2%
Naturalized citizen	334	16.5%
Not a US citizen	180	53.9%

Ancestry

Ancestry	Count	%
Italian	289	14.3%
German	62	3.1%
French	52	2.6%

Ancestry	Count	%
Arab	37	1.8%
Polish	25	1.2%
Norwegian	4	0.2%

Technology access

Metric	% of households
Computer access	28.3%
Internet access	94.8%

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

Frequently asked questions

What is the ZIP code for Byron, CA?

Byron, CA has one ZIP code: 94514.

What is the main ZIP code for Byron, CA?

The primary ZIP code for Byron, CA is 94514. The city uses area code 925 for phone service.

What county is Byron, CA in?

Byron is located in Contra Costa County, California.

How many ZIP codes are in Byron, CA?

Byron, CA has 1 ZIP code.

What ZIP code covers the Byron area near the Byron Airport industrial zone?

Byron, CA's single ZIP code is 94514, which encompasses the entire Byron area including the Byron Airport and surrounding industrial and agricultural zones.

What is the correct ZIP code for mailing addresses in Byron near the Contra Costa County eastern boundary?

All mailing addresses in Byron use the ZIP code 94514, as this is the only ZIP code designated for this Contra Costa County community.