California · Checked Against SSA's Locator October 1, 2026

Social Security Offices Near Union City, CA

Where Is the Social Security Office Nearest Union City, CA?

The closest Social Security office to Union City, CA is the Fremont Social Security Office in Fremont, about 3.9 miles away, phone (888) 632-7073, open Monday to Friday, 9:00 AM to 4:00 PM. Hayward Social Security Office is about 5.8 miles away.

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Closest Social Security Offices to Union City, CA

Straight-line distance from the center of Union City (U.S. Census Gazetteer) to each office's address (U.S. Census Bureau geocoder). Office hours and phone numbers from SSA's office data, checked against SSA's Office Locator on October 1, 2026; confirm with SSA's Office Locator before you go.

Map of Social Security Offices Near Union City

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Social Security office

Which Social Security Office Serves Your ZIP Code in Union City?

SSA splits Union City's 2 ZIP codes among 2 offices: 1 to the Hayward Social Security Office and 1 to the Fremont Social Security Office. SSA assigns offices by ZIP code, so the office to use is the one listed for your ZIP.

Social Security office assigned to each ZIP code in Union City
ZIP codeOffice SSA assignsDistance
94552Hayward Social Security Office for ZIP code 945526.4 miles
94587Fremont Social Security Office for ZIP code 945875.6 miles

ZIP code 94552 goes to the Hayward Social Security Office, 24301 Southland Dr, Suite 500, Hayward.

ZIP code 94587 goes to the Fremont Social Security Office, 3100 Mowry Ave, Suite 100, Fremont.

Assigned offices from SSA's Office Locator, looked up by ZIP code on October 1, 2026. ZIP codes are those whose area overlaps Union City (U.S. Census Bureau, 2020 ZIP Code Tabulation Areas). Distance is straight-line, from the center of the ZIP code to the office.

Social Security Offices Near Areas Around Union City

Where people in nearby communities go, and how far it is. Each area's office is the one SSA assigns to its ZIP codes.

Social Security Office Near Pleasanton

Pleasanton is about 8.7 miles northeast of central Union City. SSA assigns its ZIP codes (94566 and 94588) to the Hayward Social Security Office at 24301 Southland Dr, Suite 500, Hayward, open Monday to Friday, 9:00 AM to 4:00 PM. The Fremont Social Security Office is closer to central Pleasanton (about 9.6 miles, against 12 miles), but it isn't the office SSA assigns.

More on Social Security offices near Pleasanton

Social Security Office Near Hayward

Hayward is about 4.9 miles west of central Union City. Its ZIP codes are split between offices: 94541, 94542, 94544 and 94545 go to the Hayward Social Security Office in Hayward; 94587 goes to the Fremont Social Security Office in Fremont.

More on Social Security offices near Hayward

Social Security Office Near Dublin

Dublin is about 10 miles northeast of central Union City. SSA assigns its ZIP code, 94568, to the Hayward Social Security Office at 24301 Southland Dr, Suite 500, Hayward, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Dublin

Social Security Office Near Menlo Park

Menlo Park is about 11 miles southwest of central Union City. SSA assigns its ZIP code, 94025, to the Redwood City Social Security Office at 1718 Broadway St, Redwood City, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Menlo Park

Social Security Office Near Fremont

Fremont is about 8.6 miles southeast of central Union City. SSA assigns its ZIP codes (94536, 94538, 94539, 94555 and 94560) to the Fremont Social Security Office at 3100 Mowry Ave, Suite 100, Fremont, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Fremont

Social Security Office Near San Lorenzo

San Lorenzo is about 8.2 miles northwest of central Union City. SSA assigns its ZIP code, 94580, to the Hayward Social Security Office at 24301 Southland Dr, Suite 500, Hayward, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near San Lorenzo

Social Security Office Near Newark

Newark is about 6.8 miles south of central Union City. SSA assigns its ZIP code, 94560, to the Fremont Social Security Office at 3100 Mowry Ave, Suite 100, Fremont, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near Newark

Social Security Office Near San Leandro

San Leandro is about 11 miles northwest of central Union City. SSA assigns its ZIP codes (94577, 94578 and 94579) to the San Leandro Social Security Office at 320 Davis St, San Leandro, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near San Leandro

Social Security Office Near East Palo Alto

East Palo Alto is about 11 miles southwest of central Union City. SSA assigns its ZIP code, 94303, to the Redwood City Social Security Office at 1718 Broadway St, Redwood City, open Monday to Friday, 9:00 AM to 4:00 PM.

More on Social Security offices near East Palo Alto

Social Security Office Near Sunol

Sunol is about 7.7 miles east of central Union City. SSA assigns its ZIP code, 94586, to the Hayward Social Security Office at 24301 Southland Dr, Suite 500, Hayward, open Monday to Friday, 9:00 AM to 4:00 PM. The Fremont Social Security Office is closer to central Sunol (about 6.1 miles, against 13 miles), but it isn't the office SSA assigns.

How to Get an Appointment at the Fremont Social Security Office

SSA asks you to make an appointment before you visit an office. You can schedule one online on SSA's appointment page by answering a few questions; the appointment may be by phone or in person, and you can change or cancel it from the confirmation email or text.

To book by phone, call the Fremont Social Security Office at (888) 632-7073, or SSA's national number, 1-800-772-1213 (TTY 1-800-325-0778), Monday through Friday, 8 a.m. to 7 p.m. local time. Help is available in English, Spanish and other languages.

See office hours and appointments for the best times to call and visit.

Video Appointments Near Union City

SSA also meets people by video at partner sites: Stanislaus County Homelessness Outreach in Modesto (about 56 miles). Ask an office whether a video appointment fits your visit.

Can You Skip the Trip?

You can often replace a card, update your address or get a benefit letter online with a my Social Security account. If you need to go in, check what to bring.

Frequently Asked Questions

Where Is the Social Security Office in Union City?

There isn't an office in Union City, CA itself. The closest is the Fremont Social Security Office, 3100 Mowry Ave, Suite 100, Fremont, CA 94538, about 3.9 miles away.

Which Social Security Office Serves My ZIP Code in Union City?

SSA splits Union City's 2 ZIP codes among 2 offices: 1 to the Hayward Social Security Office and 1 to the Fremont Social Security Office. SSA assigns offices by ZIP code, and the assigned office isn't always the closest one. Look up your ZIP code in the table on this page or in SSA's Office Locator.

What Are Social Security Office Hours Near Union City?

The Fremont Social Security Office is open Monday to Friday, 9:00 AM to 4:00 PM, according to SSA's office data (checked against SSA's Office Locator on October 1, 2026). Offices close on weekends and federal holidays.

What Is the Phone Number for the Social Security Office Near Union City?

SSA lists (888) 632-7073 for the Fremont Social Security Office. SSA's national number is 1-800-772-1213.

How Do I Make an Appointment at the Social Security Office Near Union City?

Schedule online on SSA's appointment page, where the appointment may be by phone or in person, or call the Fremont Social Security Office at (888) 632-7073 or SSA at 1-800-772-1213 (TTY 1-800-325-0778), Monday through Friday, 8 a.m. to 7 p.m. local time. SSA asks you to make an appointment before visiting an office.

Every Social Security office in California

Sources

  1. Social Security Administration, field office and resident station data (updated March 9, 2026)
  2. SSA Office Locator (offices and ZIP code assignments, checked October 1, 2026)
  3. U.S. Census Bureau: geocoder, 2023 Gazetteer files and 2020 ZIP Code Tabulation Area relationship files
  4. SSA: Make an appointment
  5. SSA: Contact by phone
  6. SSA: Office locator guidance (appointments and Card Centers)

Independent site, not affiliated with the Social Security Administration. Office addresses, phone numbers and hours come from SSA's public office data. To apply for benefits or manage your record, go to SSA directly at ssa.gov.