Colusa Post Office

357 Market St, Colusa, CA 95932

Contact Numbers

Phone: 530-458-3037
Fax: 530-458-5462
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 24 hours
Tuesday 24 hours
Wednesday 24 hours
Thursday 24 hours
Friday 24 hours
Saturday 24 hours
Sunday 24 hours

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 3:45pm
Sunday Closed

Bulk Mail Acceptance Hours

Monday 9:00am - 2:00pm
Tuesday 9:00am - 2:00pm
Wednesday 9:00am - 2:00pm
Thursday 9:00am - 2:00pm
Friday 9:00am - 2:00pm
Saturday Closed
Sunday Closed

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

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Packaged Stamps
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Street 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:

1041 3rd St
4.6 miles away

801 E St
6.3 miles away

170 Main St
7.1 miles away

149 Commercial St
7.6 miles 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.


your welcome


10/25/17 Last evening our mail was delivered at 7:00PM. THIS WAS NOT THE FIRST TIME IT'S BEEN LATE. I now know what SNAIL MAIL is. I hope you look into this soon..


Why do we continue to get mail 6:00pm till 7:00 pm every evening or scattered times in Walnut Ranch? Did you hire some one who is having such a bad work ethic? Baby setting problems or just does not care. To receive mail after dark encourages theft. Is very hard on seniors in the Walnut Ranch area. We should not have to guess when or what we will get. Please review the standards for Post Office Employee. and hire accordingly!


Today is 9/26/2016, the residents in Colusa, CA have not had such horrible service from this post office until now. It is my understanding they hired new people, and this seems to be their excuse. But there is VERY important information that is still sent via Mail, and because of this, the Post Office employees, must be paying more attention, No Excuses, I just can't believe how many people are not receiving their mail, because it is going to the wrong address……….??????? I HOPE YOU SHAPE UP, BECAUSE THE EMPLOYEES HERE NEED SOME HELP……...

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