18th Street Post Office

4304 18th St, San Francisco, CA 94114

Contact Numbers

Phone: 415-431-3826
Fax: 415-553-3908
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 7:30am - 5:00pm
Tuesday 7:30am - 5:00pm
Wednesday 7:30am - 5:00pm
Thursday 7:30am - 5:00pm
Friday 7:30am - 5:00pm
Saturday 7:30am - 3:00pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 3:00pm
Sunday Closed

*This facility does not process US Passports applications or renewals. Check nearby locations below.

  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Lobby has Copier
  • Lobby has Fax
  • Lobby has Vending

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

Noe Valley
4083 24th St
0.4 mile away

Clayton Street
554 Clayton St
0.6 mile away

Diamond Heights
5262 Diamond Heights Blvd
0.7 mile away

Mission San Francisco
1198 S Van Ness Ave
0.8 mile away


*Comments below are not read by postal employees. Please do not post personal information.

*By clicking Submit, you agree to our Privacy Policy & Terms of Use.


Payment pending complete with $25.00 razer gold approximity from Amazon


Your 18th Street post office in San Francisco NEVER EVER answers its phone number. I'm calling (415) 431-3826 from Sun City, AZ, to inform you that some of our mail at 560 Castro St., #8, SF, CA 94114, is NOT being forwarded to our temporary address of 9726 W. Timberline Drive, Sun City, AZ 85351. Some IS being forwarded but a friend went by our SF address this week and found our mailbox full. Please call [number removed] to correct this. Michael McKee Or John Snead

*postallocations.com is not a part of, or affiliated with, the official United States Postal Service (USPS).