San Mateo, CA · Social Security Field Office
800 South Claremont St, Suite 101
San Mateo, CA 94402
Call (866) 726-8193 for the San Mateo Social Security OfficeDirections to the San Mateo Social Security Office
Fax: (833) 950-2108
| Monday | 9:00 AM to 4:00 PM |
|---|---|
| Tuesday | 9:00 AM to 4:00 PM |
| Wednesday | 9:00 AM to 4:00 PM |
| Thursday | 9:00 AM to 4:00 PM |
| Friday | 9:00 AM to 4:00 PM |
| Saturday and Sunday | Closed |
From SSA's office data, updated March 9, 2026, and checked against SSA's Office Locator on October 1, 2026. Closed on federal holidays.
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Many Social Security tasks don't need a visit. You can often replace a card, change your address or get a benefit verification letter online through a my Social Security account. If you do need to go in, see what to bring and how appointments work.
Office details come from SSA's office data (updated March 9, 2026). Offices move and hours change, so confirm with SSA's Office Locator and office closings page before you go.
SSA asks you to make an appointment before you visit an office. Schedule online on SSA's appointment page, where the appointment may be by phone or in person, or call this office at (866) 726-8193 or SSA at 1-800-772-1213 (TTY 1-800-325-0778), Monday through Friday, 8 a.m. to 7 p.m. local time.
If you only need a new or replacement Social Security card or to update your personal information, SSA directs you to a Card Center where your ZIP code has one.
SSA assigns 12 ZIP codes to this office. If yours is listed, this is the office to use:
940029401094018940199403094037940389406694401944029440394404
From SSA's Office Locator, looked up by ZIP code on October 1, 2026.
Straight-line distance between office addresses (U.S. Census Bureau geocoder).
All Social Security offices in California · Social Security offices near San Mateo
Monday to Friday, 9:00 AM to 4:00 PM, according to SSA's office data (updated March 9, 2026). Offices are closed on weekends and federal holidays. Check SSA's office closings page before you go.
SSA's Office Locator assigns 12 ZIP codes to this office: 94002, 94010, 94018, 94019, 94030, 94037, 94038, 94066, 94401, 94402, 94403 and 94404. SSA assigns offices by ZIP code, so if yours is listed, this is your office.
SSA lists (866) 726-8193 for this office and (833) 950-2108 as its fax number. SSA's national number is 1-800-772-1213.
800 South Claremont St, Suite 101, San Mateo, CA 94402.
The Redwood City Social Security Office in Redwood City, CA is about 7.4 miles away, phone (888) 860-5582. The next closest is Daly City Social Security Office, about 11 miles away.
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.