Walnut Post Office

NOTICE: The Postal Service is an essential government service, and will remain open wherever possible.

280 S Lemon Ave, Walnut, CA 91788

Contact Numbers

Phone: 909-444-7901
Fax: 909-598-0524
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

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

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 5:00pm
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
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Sure Money
  • Lot Parking

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:

Rowland Heights
1521 Nogales St
1.5 miles away

Diamond Bar
1317 S Diamond Bar Blvd
2.0 miles away

South Hill
1418 S Azusa Ave Ste D1
2.4 miles away

Federal Covina
170 E College St
3.2 miles away


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9405511108296502915980 This is my tracking number.. I have been waiting for 3 weeks and the package still is a awaiting item


Needing to apply for a passport. - First time


The landscaping is embarrassing at the Walnut Post Office.


I have called the 909 # for Walnut, ca five times No answer. Disturbing at leave have a message y'all are on lock down or whatever.


The mail carrier person sometimes mix up my address with the neighbor's address and delivers wrong mail / package quite oftenly. I am at 20260 Vejar Rd, Neighbor is 20266 Vejar Rd. I am concern if I miss some important mails because of this issue.

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