Where is Union City, California Located in the United States? - Union City is a city located in the Alameda County in California, United States. Union City lies between 37.5934 Degrees North latitudes and -122.0438 Degrees West longitudes.
Location Map of Union City, Alameda, California
About Map: The map shows the location of Union City in Alameda County, in the U.S. state of California.
Union City Map, California, USA
About Union City Map: This Google Map provides a detailed view with zoom, satellite, and street options to explore the area and its surroundings.
About Union City, Alameda County, California
Union City is located in Alameda County in the U.S. state of California, United States. It lies in the northern part of the state in the state of the United States within the East Bay region along the eastern shore of San Francisco Bay. The city was incorporated in 1959 and was formed through the merger of several communities including Alvarado and Decoto, and it developed from agricultural land into a diverse residential and industrial community.
Population
According to the United States Census Bureau, the population of Union City is 70,143 as recorded in the 2020 Census, and the population density is approximately 3,600 people per square mile.
Geography
According to the United States Census Bureau, Union City covers a total area of approximately 19.5 square miles (about 50.5 square kilometers), including about 19.3 square miles (50.0 square kilometers) of land and 0.2 square miles (0.5 square kilometers) of water.
Location and Surroundings
Union City is situated south of Hayward and north of Fremont, positioned between the East Bay hills and the shoreline of San Francisco Bay. The city features suburban neighborhoods, industrial areas, and access to regional parks and wetlands. Interstate 880 runs through the city, providing a major transportation route connecting Union City to Oakland, San Jose, and other Bay Area communities.
Top Attractions
Union City offers parks, community centers, and cultural events that support recreation and tourism. Popular destinations include the Alameda Creek Regional Trail, Quarry Lakes Regional Recreation Area nearby, and the Union Landing shopping district. The city hosts annual festivals and community programs that reflect its diverse population and civic engagement.
Transportation
Union City is served by Interstate 880 and State Route 238, offering convenient highway access throughout the Bay Area. Public transportation includes BART service and regional bus connections linking the city to surrounding communities. The nearest major airport is Oakland International Airport, located approximately 10 miles to the north.
Explore more cities in California or visit the United States Map section to learn more about the country’s geography.
Sources:
Population and area data sourced from the United States Census Bureau (2020 Census). General city information referenced from the Official Union City Website.
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Union City City Facts
| City | Union City |
| State | California |
| County | Alameda County |
| Country | United States |
| Region | San Francisco Bay Area - East Bay |
| Incorporated | January 13, 1959 |
| Founded | 1950s consolidation of communities |
| Total Area | Approximately 19.5 sq mi (50.5 km2) |
| Land Area | Approximately 19.3 sq mi (50.0 km2) |
| Elevation | Approximately 23 ft (7 m) |
| Population (2023 estimate) | Approximately 70,000+ |
| Population (2020 Census) | 70,143 |
| Population Density | Approximately 3,600 people per sq mi |
| Time Zone | Pacific Time (UTC-8 / UTC-7 DST) |
| ZIP Codes | 94587 |
| Area Code | 510 |
| Major Highways | Interstate 880, State Route 84 |
| Public Transit | BART (Union City station), AC Transit |
| Major Attractions | Coyote Hills Regional Park, Union Landing Shopping Center, Ardenwood Historic Farm (nearby) |
| Official Website | https://www.unioncity.org/ |
Distance from Union City City, CA to Nearby Cities
- Fremont, CA – 5 miles (8 km)
- Hayward, CA – 7 miles (11 km)
- Newark, CA – 6 miles (10 km)
- San Leandro, CA – 10 miles (16 km)
- Castro Valley, CA – 10 miles (16 km)
- Milpitas, CA – 15 miles (24 km)
- San Jose, CA – 20 miles (32 km)
- Santa Clara, CA – 18 miles (29 km)
- Sunnyvale, CA – 22 miles (35 km)
- Mountain View, CA – 20 miles (32 km)
- Palo Alto, CA – 18 miles (29 km)
- Redwood City, CA – 22 miles (35 km)
- San Mateo, CA – 25 miles (40 km)
- Oakland, CA – 25 miles (40 km)
- Berkeley, CA – 30 miles (48 km)
- Dublin, CA – 18 miles (29 km)
- Pleasanton, CA – 20 miles (32 km)
- San Ramon, CA – 22 miles (35 km)
- San Francisco, CA – 35 miles (56 km)
- Concord, CA – 35 miles (56 km)
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