Union City, CA ZIP Codes & Directory
Union City is located in Alameda County in California. Browse all active 5-digit USPS ZIP codes serving Union City and surrounding Alameda County delivery districts.
All ZIP Codes in Union City, CA
1 CodesAbout Union City Mail Delivery & Postal Administration
ZIP codes in Union City are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing Alameda County and surrounding California metropolitan districts.
Frequently Asked Questions About Union City, CA ZIP Codes
How many ZIP codes serve Union City, California? ▾
Union City, California is served by 1 active USPS postal delivery codes: 94587.
What county is Union City located in? ▾
Union City is an incorporated city located within Alameda County, California.
What is the population and demographic size of Union City? ▾
According to official U.S. Census Bureau data, Union City has an estimated population of 70,121 residents and is situated within the undefined.
How does mail sorting and delivery work in Union City? ▾
Mail delivery in Union City is operated by the United States Postal Service (USPS) through regional Sectional Center Facility (SCF) distribution plants servicing Alameda County and surrounding California counties.
How much does it cost to ship a package to Union City, CA? ▾
Shipping costs to Union City depend on the package weight, dimensions, shipping carrier (USPS, UPS, FedEx), and the distance from the origin ZIP code. To calculate exact postage rates, use our shipping cost estimator tool.
What is the standard delivery time for mail to Union City? ▾
Standard USPS Ground Advantage typically takes 2-5 business days to reach Union City, depending on the origin. Priority Mail generally arrives in 1-3 business days. Please check tracking for specific regional routing times.