How to cancel Northwestern Energy

Submit a question about your account using our online account inquiry form and a customer service representative will follow up with you. You can also give us a call.

To cancel over the phone, call: (888) 467-2669

NorthWestern Corporation owns NorthWestern Energy, a utility company that serves South Dakota, Nebraska, and Montana that is based in Sioux Falls. As of December 31, 2007, the company serves approximately 650,000 customers.

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