The Northern Star Coop Main Office is Located in Deer River at 105 Main Ave West, in the back portion of the Cenex Convenience Store. We are here to help with billing questions, ordering, or any concern that you may have with our company. Please call us at 218-246-8296 or 800-864-3767. Better yet, stop in and meet the face that belongs to the voice on the phone. We are open 8:00 A.M - 5:00 P.M. Monday through Friday.