Home/PostalMag/Post Office Photos/Bearcreek, Montana Post Office Post Office Photos Bearcreek, Montana Post Office PostalMag · Thursday, October 31, 2019 The Bearcreek, Montana Post Office serves ZIP Code 59007. Photo by Jimmy Emerson, some rights reserved. Photo shared under the Creative Commons License. Bearcreek Post Office 139 Main St Bearcreek, MT 59007