NorthWestern Energy

NorthWestern Energy, an investor-owned “mid-sized” public utility, serves approximately 388,000 electric and 262,000 natural gas customers in Montana, South Dakota and Nebraska, has one of the largest U.S. service territories, and is one of the largest providers of electricity and natural gas in the northwest quadrant of the U.S.

11 East Park Street
Butte, MT, 59701-1711
406.497.3333 (phone)

NorthWestern Energy Website