NorthWestern Energy headquarters details
- Street address
- 3010 W 69th St
- City
- Sioux Falls
- State / region
- South Dakota
- ZIP / postal code
- 57108-5613
- Country
- United States
- Phone
- +1 605 978 2900
- Founded
- 1923
- Website
- northwesternenergy.com
- Stock
- NASDAQ: NWE
Location map
Open in Google MapsAll NorthWestern Energy office locations
| City | State / region | Country | Type |
|---|---|---|---|
| Sioux Falls HQ | South Dakota | United States | Headquarters |
Showing the headquarters of 57 recorded locations. See every location in GraphIQ →
About NorthWestern Energy
NorthWestern Energy (NASDAQ: NWE) is headquartered in Sioux Falls, South Dakota, United States. Founded in 1923, the company has 57 recorded locations across 2+ countries and employs approximately 1,667 people worldwide.
Where is NorthWestern Energy's main office?
NorthWestern Energy's main headquarters office is located at 3010 W 69th St, Sioux Falls, South Dakota 57108-5613, United States. This is the company's primary corporate address.
NorthWestern Energy regional offices
Beyond its headquarters in Sioux Falls, NorthWestern Energy has recorded locations in United States and Australia.
NorthWestern Energy contact information
The main switchboard for NorthWestern Energy headquarters can be reached at +1 605 978 2900. Official website: northwesternenergy.com.
What does NorthWestern Energy do?
Northwestern Energy Group, Inc., doing business as NorthWestern Energy, operates as a utility company. The Company engages in generating and distributing electricity and natural gas to residential, commercial, and industrial sectors. NorthWestern Energy serves customers in the States of South Dakota, Nebraska, and Montana.
NorthWestern Energy competitors & similar companies
Frequently asked questions
Where is NorthWestern Energy headquarters?
NorthWestern Energy's headquarters is located at 3010 W 69th St, Sioux Falls, South Dakota 57108-5613, United States.
How many offices does NorthWestern Energy have?
GraphIQ records 57 locations for NorthWestern Energy across 2+ countries, as of October 2026.
What is NorthWestern Energy's corporate address?
The corporate headquarters address is 3010 W 69th St, Sioux Falls, South Dakota 57108-5613, United States.
When was NorthWestern Energy founded?
NorthWestern Energy was founded in 1923 and employs approximately 1,667 people.
What is NorthWestern Energy's phone number?
The main phone number for NorthWestern Energy headquarters is +1 605 978 2900.
How many employees does NorthWestern Energy have?
NorthWestern Energy has approximately 1,667 employees (GraphIQ estimate, 2026).
Is NorthWestern Energy a public company?
Yes. NorthWestern Energy is publicly traded on NASDAQ under the ticker NWE.