Sidney Post Office

101 W Holly St, Sidney, MT 59270

Contact Numbers

Phone: 406-482-2107
Fax: 406-482-1759
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 3:30pm
Tuesday 3:30pm
Wednesday 3:30pm
Thursday 3:30pm
Friday 3:30pm
Saturday 3:30pm
Sunday Closed

Passport Appointment Hours*

Monday 9:00am - 2:00pm
Tuesday 9:00am - 3:00pm
Wednesday 9:00am - 3:00pm
Thursday 9:00am - 3:00pm
Friday 9:00am - 3:00pm
Saturday Closed
Sunday Closed

  • Visit our Passport FAQ page for a complete overview of what to bring, what you need to know, and how long it will take.
  • You will need two forms of Identification with copies.
  • A passport quality photo. Available at location.
  • The appropriate application form printed and filled out, and the required fee for applying or renewing.
  • You can find up to date costs, information, and forms at the State Departments Travel Site

*An appointment is required to apply for or renew US Passports. Please Call 406-282-2107 or schedule online.

Bulk Mail Acceptance Hours

Monday 9:00am - 3:00pm
Tuesday 9:00am - 3:00pm
Wednesday 9:00am - 3:00pm
Thursday 9:00am - 3:00pm
Friday 9:00am - 3:00pm
Saturday 9:00am - 11:00am
Sunday Closed

  • 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)
  • Passport Acceptance
  • Passport Photo
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Lot Parking
  • Passport Appointment Hours

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:

Crane
117 Garfield Ave
7.0 miles away

Fairview
515 S Ellery Ave
7.0 miles away

Savage
264 Main St
13.0 miles away

Bainville
306 Clinton Ave
17.1 miles away

Reviews

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Dear Sirs. I sent a small box from the United States to be delivered in Sydney. Tracking Number: LH104959881US Your item departed a transfer airport in PERTH, AUSTRALIA on July 28, 2020 at 11:56 pm. The item is currently in transit to the destination. I would like to know if you are aware of this item and how long it takes to reach its destination. Thank you
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I am complaining about poor mail delivery on 6th ST SE. No mail was delivered on Saturday, March 11th, although the mail delivery van was in the area.
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