United States Postal Service

2.6
29 reviews
Person picking up a package from USPS smart lockers

About

Post OfficeShipping ServiceCargo ServicePackaging Supply StoreLogistics ServiceMoney Order ServiceVisa and Passport OfficeUnited States Postal Service
Visit your local Post Office™ at 101 W Holly St to find everything you need to send mail and ship packages. Explore our other products and services like money orders, Post Office™ boxes, passports, gift cards, and more

Location

United States Postal Service
101 W Holly St, Sidney, MT
59270, United States

Hours

Reviews

2.6
29 reviews
5 stars
8
4 stars
4
3 stars
0
2 stars
2
1 star
15
  • RR
    Ryan
    Dec 13, 2025
    5.0
    For a small town this post office is busy they do make mistakes but how much Sidney has grown it’s understandable I feel they take care of the mail the best they can and customer service is always good
  • TW
    Treydan Wipf
    Dec 9, 2025
    4.0
    Personally have never had any problems. Packages do arrive quite late into the day (7PM) which is a mild annoyance but I'm sure it's just a staffing issue.
  • VD
    Vickie Dore
    Aug 16, 2024
    4.0
    Fast, courteous, & knowledgeable staff.
  • BC
    bret croucher
    Mar 9, 2014
    1.0
    of all the post office places ive ever been to Sidney,mt is by far the worst,they must not drug test here. When you try to change your address, they send your mail to the person who left your house for over a year now, and when you ask them about it they are rude and don't even try to fix the problem. We need lower letters to grade the Sidney post office. They are pathetic to say the least. My advise is to get a P.O. Box in glendive

Frequently Asked Questions About United States Postal Service

Can I get a passport application at this Post Office?

Yes, Thousands of Post Offices™ accept first-time passport applications for the U.S. Department of State. Most of those locations can also take your passport photo. Please complete and print your passport application form before you apply.

Is an appointment needed for passport services?

Most Post Offices that offer passport services have set hours, and you'll need to schedule an appointment using our online scheduler. We also offer limited Passport walk-in hours at select locations.