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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 www.northwesternenergy.com 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.