Union City ZIP Codes — Alameda County, CA

There is one unique ZIP code in Union City, California and it is 94587. Area code: 341/510.

ZIP codes

19.63

sq mi land

1.12

sq mi water

341/510

area code

Union City, CA ZIP code map

About Union City, CA

Union City, California, is a vibrant city located within Alameda County. Known for its diverse community and suburban feel, Union City offers a mix of residential living and commercial development. With a rich history and numerous parks, it provides a welcoming environment for families and individuals alike.

Location & geography

Union City is situated in the eastern part of the San Francisco Bay Area, bordered by cities such as Hayward to the south, Fremont to the north, and Newark to the east. The city covers a total land area of 19.63 square miles, complemented by a water area of 1.12 square miles. The terrain is characterized by rolling hills and flatlands, which are common in the Bay Area.

Community & economy

The character of Union City is marked by its strong community spirit and cultural diversity, making it a welcoming place for people from various backgrounds. Key industries in Union City include retail, healthcare, and technology, providing ample employment opportunities for residents. Daily life in the city is enriched by local parks, community events, and various recreational facilities that foster an active lifestyle.

Transportation

Union City is well-served by major highways, including Interstate 880, which provides convenient access to both San Francisco and San Jose. The nearest airport for residents and travelers is the Oakland International Airport, located approximately 15 miles away. Public transit options, including BART and AC Transit, make commuting to neighboring cities more accessible.

History

Union City was incorporated in 1959, formed from the merging of several smaller communities, including Alvarado, Decoto, and Newark. Historically, the city's economy was rooted in agriculture and industry, but over time it has evolved to include modern commercial and residential developments. Notable events in Union City's history include the establishment of the Union City Historical Museum, which showcases the area's rich past.

Did you know?

One surprising fact about Union City is that it is home to a variety of cultural festivals that celebrate its diverse population. Additionally, the city boasts numerous parks and recreational areas, making it a great destination for outdoor enthusiasts.

ZIP codes for Union City, CA (1)

ZIP code	City	County	Map
94587	Union City	Alameda	View map

Demographics & statistics

69,502

Population

41.3

Median age

$138,013

Median household income

$52,646

Per capita income

$1,006,600

Median home value

$2,593

Median monthly rent

66.0%

Home ownership

6.6%

Poverty rate

4.6%

Unemployment

14,561

Housing units

45.0%

Bachelor's or higher

Age distribution

Male Female

1,634

Under 5

1,579

1,702

5–9

1,645

1,913

10–14

1,848

1,768

15–19

1,708

1,987

20–24

1,920

5,154

25–34

4,979

5,429

35–44

5,246

4,600

45–54

4,444

2,328

55–59

2,249

2,494

60–64

2,410

3,680

65–74

3,556

1,871

75–84

1,807

789

85+

762

← Male

Female →

Age summary

Group	Count	%
Under 18	12,274	17.7%
18 and over	57,228	82.3%
65 and over	12,465	17.9%
Median age	41.3 years

Race & ethnicity

Asian 48.2%

White 15.2%

Hispanic or Latino 13.7%

Other race 9.9%

Two or more races 7.5%

Black or African American 4.1%

Native Hawaiian / Pacific Islander 0.7%

American Indian / Alaska Native 0.6%

Group	Count	%
Asian	38,809	48.2%
White	12,248	15.2%
Hispanic or Latino	11,074	13.7%
Other race	7,997	9.9%
Two or more races	6,053	7.5%
Black or African American	3,326	4.1%
Native Hawaiian / Pacific Islander	590	0.7%
American Indian / Alaska Native	479	0.6%

Household income

Under $10k 3.1%

$10k–$15k 1.4%

$15k–$25k 3.4%

$25k–$35k 2.4%

$35k–$50k 4.7%

$50k–$75k 9.6%

$75k–$100k 11.0%

$100k–$150k 19.3%

$150k–$200k 13.1%

$200k+ 32.0%

Range	% of households
Under $10k	3.1%
$10k–$15k	1.4%
$15k–$25k	3.4%
$25k–$35k	2.4%
$35k–$50k	4.7%
$50k–$75k	9.6%
$75k–$100k	11.0%
$100k–$150k	19.3%
$150k–$200k	13.1%
$200k+	32.0%
Median income	$138,013

Housing

Home values

Under $50k 1.0%

$50k–$100k 1.1%

$100k–$150k 1.9%

$150k–$200k 2.1%

$200k–$300k 1.9%

$300k–$500k 4.4%

$500k–$1M 36.8%

$1M+ 50.8%

Housing overview

Metric	Value
Median home value	$1,006,600
Median rent / month	$2,593
Owner occupied	66.0%
Renter occupied	34.0%
Vacant	3.7%
Single-family detached	60.9%
Large apartment buildings	13.0%
Mobile homes	4.6%
Median rooms	5.2
Avg household size (owned)	3.30

Year built

Era	%
2020 or later	0.1%
2010–2019	3.9%
2000–2009	9.9%
1990–1999	15.4%
1980–1989	16.7%
1970–1979	33.4%
1960–1969	12.2%
1950–1959	5.0%
1940–1949	1.5%
1939 or earlier	2.0%

Bedrooms

Size	% of units
No bedroom (studio)	1.8%
1 bedroom	8.9%
2 bedrooms	20.9%
3 bedrooms	33.1%
4 bedrooms	28.8%
5+ bedrooms	6.4%

Vehicles per household

Vehicles	% of households
No vehicle	5.7%
1 vehicle	21.7%
2 vehicles	35.4%
3 or more	37.2%

Heating fuel

Fuel type	%
Utility gas	72.3%
Electricity	25.0%
Propane / LP gas	1.4%
Solar	0.3%
No fuel used	0.9%

Households & families

Household type	Count	%
Married-couple family	13,651	65.4%
Cohabiting couple	651	3.1%
Male householder, no spouse	2,714	13.0%
Female householder, no spouse	3,844	18.4%
Households with children under 18	7,042	33.8%
Households with seniors (65+)	7,731	37.1%
Average household size	3.28

Marital status

Status	Male	Female
Never married	34.8%	27.0%
Married	57.6%	54.9%
Separated	0.9%	1.1%
Widowed	1.8%	9.0%
Divorced	4.9%	8.0%

Education

Less than 9th grade 6.5%

Some HS, no diploma 6.3%

HS graduate 19.8%

Some college, no degree 16.0%

Associate's degree 6.4%

Bachelor's degree 28.7%

Graduate / professional 16.3%

Metric	%
HS diploma or higher	87.1%
Bachelor's or higher	45.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	786	5.5%
Kindergarten	714	5.0%
Elementary school	5,622	39.2%
High school	2,906	20.2%
College / grad school	4,323	30.1%

Employment

Industry of employment

Education & healthcare 20.5%

Professional & management 20.4%

Manufacturing 15.7%

Retail trade 8.8%

Transportation & utilities 6.7%

Arts, food & hospitality 6.3%

Finance & real estate 5.0%

Construction 4.0%

Information 3.8%

Other services 3.3%

Public administration 3.0%

Wholesale trade 2.3%

Agriculture & mining 0.2%

Occupation

Category	%
Management, business & arts	48.4%
Service	15.2%
Sales & office	16.8%
Natural resources & construction	5.3%
Production & transportation	14.3%

Employment type

Type	%
Private sector	85.1%
Government	10.3%
Self-employed	4.5%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	61.7%
Carpool	11.2%
Public transit	7.0%
Walk	0.6%
Other means	2.5%
Avg commute (minutes)	33.0

Poverty

All people 6.6%

Under 18 years 5.7%

18 and over 6.8%

Married-couple families 3.2%

Female-led households 9.1%

Income support

Source	% of households
Social Security	31.1%
Retirement income	22.2%
Supplemental Security	5.2%
Cash public assistance	5.8%
Food stamps / SNAP	7.3%

Health indicators

Condition	%
High blood pressure	24.6%
High cholesterol	28.5%
Heart disease	4.0%
Stroke	2.1%
Asthma	7.6%
Arthritis	15.4%
Kidney disease	2.0%
Pulmonary disease	3.5%
Cancer	4.3%

Behavior / access	%
Binge drinking	13.8%
No physical activity	18.6%
Less than 7 hrs sleep	30.0%
Fair or poor health	11.0%
Poor mental health	11.6%
Poor physical health	7.1%
No health insurance	11.0%
Visited doctor (checkup)	64.9%
Visited dentist	63.1%
Cholesterol screening	91.3%
Teeth loss	7.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,075	3.6%

Disability	%
Any disability	9.8%
Under 18	2.1%
18–64 years	6.2%
65 and over	30.2%

Health insurance coverage

Type	%
Private insurance	73.6%
Public insurance	32.8%
Uninsured under 19	3.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	66,289	95.4%
Spanish	15,508	23.4%
Other Indo-European	3,376	5.1%
Asian & Pacific Islander	2,706	4.1%
Other languages	9,172	13.8%

Place of birth & citizenship

Origin	Count	%
Native born (US)	36,645	52.7%
Born in same state	35,394	50.9%
Born in different state	30,235	43.5%
Foreign born	1,251	1.8%
Naturalized citizen	32,857	47.3%
Not a US citizen	22,475	68.4%

Ancestry

Ancestry	Count	%
Italian	1,833	2.6%
French	1,335	1.9%
Arab	708	1%
English	300	0.4%
Polish	294	0.4%

Ancestry	Count	%
Dutch	111	0.2%
Irish	59	0.1%
German	24	0%
Norwegian	5	0%

Technology access

Metric	% of households
Computer access	30.0%
Internet access	97.8%

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

Frequently asked questions

What ZIP codes does Union City, CA have?

Union City, CA has one ZIP code: 94587. Each ZIP code serves a distinct delivery area within the city and surrounding region.