Union City, CA: Population, ZIP Codes & Nearby Cities

Union City is an incorporated city in Alameda County, California. In the dataset behind this page it has an estimated population of 74,107, sits at 37.603°N, 122.019°W, and observes Pacific time. Below you will find how it ranks inside California, which ZIP codes it uses, the closest places around it, and how far it is from major US cities.

What are the key facts about Union City, CA?

What is the population of Union City, CA?

Union City has an estimated population of 74,107. That makes it the 133rd largest of the 1,470 places we list in California, and the 9th largest of 20 places in Alameda County. The typical place in California has about 3,379 residents, so Union City is roughly 21.9 times the size of a typical neighbor in the state.

Estimates for places of this size carry wider margins of error than those for big cities, so treat the figure as a guide to scale. Our guide to understanding city population numbers explains why sources disagree.

Places in California with a similar population include Baldwin Park (75,251), Rancho Cordova (75,087), Lodi (74,773), Apple Valley (73,453), Pittsburg (72,588). Comparing these pages is a quick way to see how Union City differs from communities of the same scale.

How dense is Union City?

Union City has about 3,818 people per square mile (1,474 per square kilometer), which we classify as suburban. Within California, it is denser than about 77% of the listed places. Land at this level is usually a mix of single-family neighborhoods, shopping corridors and parks, where driving is common but destinations are close. Read how to interpret population density to see how we draw these lines.

What ZIP codes does Union City use?

The postal data lists a single ZIP code for Union City: 94587. A single code usually means a compact delivery area, but the same code may also serve addresses just outside the town line. Codes beginning with 9 are assigned to the Pacific states (Alaska, California, Hawaii, Oregon and Washington). Learn more in our guide to how ZIP codes work or check any code with the ZIP code lookup.

What time zone is Union City in?

Union City is in the Pacific time zone, which is UTC−8 from Coordinated Universal Time in standard time (IANA zone America/Los_Angeles). The area observes daylight saving time, so clocks move forward in March and back in November. The nearest listed place in a different time zone is Bullhead City, AZ, about 450 miles away, which gives a sense of how far the nearest zone boundary may be. Current local time: see the Pacific time hub. For the rules behind these zones, read US time zones explained.

Where is Union City located in California?

Union City lies in the western part of California, at 37.603° north latitude and 122.019° west longitude. The state capital, Sacramento, is about 73 miles to the northeast. The closest listed place in another state is Gardnerville Ranchos, NV, roughly 152 miles to the northeast, which shows how near Union City is to a state line. For big-city services, the nearest place with more than 100,000 people is Hayward, CA, 4 miles to the northwest.

Which cities are near Union City, CA?

The closest listed place to Union City is Hayward, CA, 3.8 miles to the northwest. Of the eight nearest places below, 8 are in the same county. Distances are straight-line (great-circle) miles measured between place centers; see how distance is calculated.

Which county is Union City in?

Union City is in Alameda County, which has the Federal Information Processing Standards (FIPS) code 06001. The county contains 20 places in our data, 19 of which have their own page here and 1 smaller communities that appear only in county and state lists. Other places in the county include Oakland (433,031), Fremont (241,110), Hayward (159,203), Berkeley (121,363), Livermore (90,923). Codes like this one help separate places that share a name; see the guide to counties and FIPS codes.

How far is Union City from major US cities?

Among six major hubs, Union City is closest to Los Angeles, CA at about 315 miles and farthest from New York, NY at about 2,554 miles in a straight line. Road distances are usually 10 to 30 percent longer. Try the distance calculator for any other pair.

Are there other places called Union City?

Yes. Our data lists 8 other places named Union City: Union City, NJ (67,982), Union City, GA (22,399), Union City, TN (10,325), Union City, IN (5,223), Union City, PA (3,174), Union City, OK (2,157), Union City, OH (1,588), Union City, MI (1,564). When you search for Union City, add the state or county so you land on the right one. This page covers the Union City in Alameda County, California.

Planning a move to Union City?

If you are weighing Union City, start with the practical numbers: how far it is from where you live, whether it changes your time zone, and how its size and density compare with your current city. Use the distance calculator to measure the trip from where you live. The radius search tool lists every place within any distance of it. Our checklist for comparing cities explains what to check next.

Where to go next

Population and density come from a compiled dataset and are estimates. They may differ from official Census Bureau counts. Verify important figures at census.gov.