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Northwestern Energy Utilities/Energy

313 Cedar St.
Yankton, SD 57078
(800) 245-6977 | (800) 245-6977
Fax: (605) 668-4620
NorthWestern Energy Website
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There are several local offices through out or territory. The Yankton Office is located at 313 Cedar. Other locations can be found on our website or by calling (800) 245-69
Yankton Office Open Monday - Friday 8am - 5pm
24-7 Internal Call Center @ (800) 245-6977

about us

For more than 100 years, NorthWestern Energy continues to deliver the energy and exceptional service that our customers and communities count on - safely, efficiently and responsibly.NorthWestern Energy provides electricity and/or natural gas to communities in South Dakota, Montana and Nebraska. We serve approximately 665,000 customers.