W ith their main offices in butte, montana, northwestern energy offers services 3 states throughout the us and is classified as an investor owned organization. Find contact's direct phone number, email address, work history, and more. Northwestern Energys Montana Street Substation To Get Upgrade For Butte Customers Abc Fox Butte Montanarightnowcom Home address and daytime phone number. Northwestern energy bozeman phone number . Welcome to the northwestern energy website. Register for my energy account: Northwestern energy's average residential electricity rate per kilowatt hour is 11.92 cents per kilowatt hour, which is 10.11% less than the average national price of 13.26 cents. Please choose a state/region below so we can deliver you the most personalized and relevant site experience possible. This plan outlines what types of energy northwestern energy will use in the next 20 years. See reviews, photos, directions, phone numbers and more for northwestern energy l...