Post Offices

Post Offices in & near Arminto, Wyoming. Operating hours, locations, phone/fax number, services information.

Powder River Post Office

Post Office in Powder River, Wyoming on W Highway 20 26. Operating hours, phone number, services information, and other locations.

Address: 35304 W Highway 20 26, Powder River, WY 82648
Phone: 307-577-8146
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Retail Hours

Monday 7:30am - 12:00pm, 12:30pm - 2:00pm
Tuesday 7:30am - 12:00pm, 12:30pm - 2:00pm
Wednesday 7:30am - 12:00pm, 12:30pm - 2:00pm
Thursday 7:30am - 12:00pm, 12:30pm - 2:00pm
Friday 7:30am - 12:00pm, 12:30pm - 2:00pm
Saturday 8:00am - 2:00pm
Sunday Closed

Lobby Hours

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

Last Collection Times

Monday 1:30pm
Tuesday 1:30pm
Wednesday 1:30pm
Thursday 1:30pm
Friday 1:30pm
Saturday 10:30am
Sunday Closed