Riverton Annex Post Office

1307 W Main St, Riverton, WY 82501

Contact Numbers

Phone: 307-857-0127
Fax: 307-856-0518
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Lobby Hours

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 5:00pm
Sunday Closed

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

  • Business Line

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:

501 E Main St
1.0 mile away

Riverton 2
501 E Main St
1.0 mile away

Saint Stephens
33 Saint Stephens Rd
1.6 miles away

280 S Main St
8.5 miles away


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Horrible time! I made two attempts at mailing a package today. The staff at the Riverton Wy Post office is super slow. I am glad the whole postal service is not run this way or it would cost $10.00 for a single stamp. My mailman is great and is fast and it shows. He always has a smile and a wave for everyone he sees. He is worth the money he gets paid. The staff at the post office do not earn their money. It is sad and very frustrating to try and mail a package that was prepaid and the info already taped to the package. All they had to do is take it from me and it still took way too long. I will be using another shipping company from here on out.

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