NorthWestern Energy

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About NorthWestern Energy

NorthWestern Energy supplies electricity to 3 states throughout the nation. Electricity companies must regularly report the total number of customers they have to government agencies. On the most recent reports the provider disclosed 457,090 customers receiving their services. Around 0.45% of these customers are industrial properties, 19.53% are commercial accounts and 80.02% are residential accounts. The average residential electricity price for customers of NorthWestern Energy is around 12.06 cents per kilowatt hour. This is 14.54% lower than the national average price of 14.11 cents. They sold 2,326,804 megawatt hours through wholesale channels to other electricity suppliers in 2020. Electricity generation and wholesale power purchases made up 46.32% and 53.47%, respectively, of the total electricity sourced by the company. Electricity plants the company owns produced 4,921,994 megawatt hours and an additional 5,681,277 megawatt hours were acquired by way of wholesale channels. NorthWestern Energy made $1,050,012,900 in 2020. Exactly $87,872,600 of that revenue came from electricity sales on the wholesale market and $876,747,900 came from sales to retail electricity customers.

Customers of the company pay an average monthly residential power bill of $90.2. This is 28.38% lower than the national average of $125.95. Electricity plants owned by NorthWestern Energy produce 4,873,172.54 megawatt hours, which is the 178th highest in the US out of 3509 suppliers. Electricity production facilities owned by the company use non-renewable fuels to generate 51.37% of their total electricity generation, or 2,503,236.54 megawatt hours. They rank 181st out of 3509 companies in the nation. Wind turbines operated by the supplier generate 284,425 megawatt hours, which is 5.84% of the electricity generation by the supplier.

NorthWestern Energy Net Metering

Luckily, NorthWestern Energy offers net metering choices to consumers. Without net metering, solar panel installation is significantly less attractive economically, as consumers have no way to sell extra electricity back into the grid.

Energy Loss

Energy loss is a fact of life when working with electricity transmission. NorthWestern Energy currently averages a loss of around 6.05% of the total electricity they produce. These averages allow us to compare the grid efficiencies of the providers who operate around the United States. NorthWestern Energy has received a ranking of 1154th best out of 3509 providers who report energy loss in the US.

NorthWestern Energy Rate & Electric Bills

NorthWestern Energy residential electric rates are highest in January and the highest average bill is in October.

Historical Electricity Rates:

Price Per kWhAverage Bill$0.126/kWh$0.111/kWh$130.90/mo.$64.31/mo.
1471st12.06¢NorthWestern Energy's Average residential price per kWh
729th$90.2Average monthly electricity bill for NorthWestern Energy's residential customers

NorthWestern Energy Overview

  • Company Type:Investor Owned
  • Headquarters:11 East Park Street
    Butte, Montana 59701
    United States of America

NorthWestern Energy Contact

NorthWestern Energy Service

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Quick Facts About NorthWestern Energy

NorthWestern Energy is 22nd out of 3509 electricity suppliers in the country in megawatt hours produced from hydroelectric power use.

NorthWestern Energy is the 126th largest electricity company out of 3509 electricity companies in the United States based on megawatt hours sold.

NorthWestern Energy generates 2,449,015.61 megawatt hours of electricity from the use of coal, ranking NorthWestern Energy 114th out of 3509 suppliers in the country.

NorthWestern Energy generates 2,369,936 megawatt hours (or 48.63% of their total production) from the use of renewable fuel sources in their power plants.

NorthWestern Energy's electricity production plants produce 45,597.01 megawatt hours from the use of natural gas.

Energy provider of the year for Montana, Major Provider Category
Largest Producer of Renewable Electricity
Montana, Major Provider Category
Claim Award
Energy provider of the year for Montana, Major Provider Category
Top 3 Lowest Energy Loss
Montana, Major Provider Category
Claim Award
Energy provider of the year for Wyoming, Major Provider Category
Top 3 Lowest Average Residential Monthly Bill
Wyoming, Major Provider Category
Claim Award

Energy Loss

NorthWestern Energy's energy loss due to business operations.


Total Energy Loss


1154 National Rank

NorthWestern Energy Energy Makeup

NorthWestern Energy Coverage Map

Coverage Map Placeholder

NorthWestern Energy State Coverage

StateCustomersSales ($)State Rank Based On Revenue% of Provider's Residential Sales in State
South Dakota64,184180,488,000417.49%

NorthWestern Energy County Coverage

CountyPopulationProvidersAvg. County Rate (¢)Avg. Electric Bill
Beadle County19,149114.48$225.06/mo
Beaverhead County9,37129.93$102.04/mo
Big Horn County13,124612.17$104.59/mo
Big Stone County5,166412.01$189.75/mo
Blaine County7,044312.53$100.57/mo
Bon Homme County7,003211.21$158.82/mo
Broadwater County6,77429.92$102.05/mo
Brown County38,301410.19$219.92/mo
Brule County5,247212.98$166.64/mo
Carbon County10,473312.44$94.29/mo

Power Plants Owned by NorthWestern Energy

PlantCity/CountyStatePrimary Fuel TypeProduction (MWh)Emission (kg)Emissions/MWhToxic Chemical ReleaseClosing Date
Colstrip MT Coal 10,539,711.0110,967,076,273.61,040.55
Mercer County ND Coal 2,112,2032,406,578,375.971,139.37
Big StoneOtter Tail Power Company (53.90%)NorthWestern Energy (23.40%)Montana-Dakota Utilities Co (22.70%)
Grant County SD Coal 1,787,572.991,786,430,706.22999.36
Woodbury County IA Coal 1,223,1901,221,644,101.87998.74
Sanders County MT Conventional Hydroelectric 469,371
Cascade County MT Conventional Hydroelectric 384,498
Cascade County MT Conventional Hydroelectric 308,369
Bon Homme County SD Wind 284,425
Cascade County MT Conventional Hydroelectric 231,237
Cascade County MT Conventional Hydroelectric 221,468

NorthWestern Energy Fuel Makeup

Conventional Hydroelectric
Conventional Hydroelectric
Conventional Hydroelectric
Conventional Hydroelectric
Conventional Hydroelectric
Natural Gas
Distillate Fuel Oil

Cities NorthWestern Energy Has Coverage

* City coverage generated based on government data. Always verify you can get service from the provider.

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NorthWestern Energy FAQ:

How many counties does NorthWestern Energy supply electricity to?

There are 75 counties that receive at least some electricity coverage by NorthWestern Energy including Montana, South Dakota, and Wyoming.

What percentage of NorthWestern Energy's electricity is produced using nonrenewable fuel types?

Power production facilities owned by or associated with NorthWestern Energy produce 51.37% of their electricity using nonrenewable fuel types.

What is the average BUNDLED electricity rate for NorthWestern Energy customers?

NorthWestern Energy's current average BUNDLED electricity rate is 12.06 cents per kilowatt hour (¢/kWh), compared to the average United States BUNDLED rate of 14.11 cents.

How many states does NorthWestern Energy offer service to?

NorthWestern Energy offers service in 3 states in the US.

How many power plants are owned by or associated with NorthWestern Energy?

NorthWestern Energy is associated with or owns 20 power plants.

What is the average bundled bill for NorthWestern Energy customers each month?

Consumers of NorthWestern Energy pay, on average, a monthly bundled bill of $90.20.

What percentage of NorthWestern Energy's electricity is generated using renewable fuels?

Power facilities owned by or associated with NorthWestern Energy produce 48.63% of their electricity from renewable fuels.

What is the phone number for NorthWestern Energy?

NorthWestern Energy's customer service phone number is (800) 245-6977

What cities does NorthWestern Energy provider electricity in?

NorthWestern Energy serves 185 cities in the country.

Last Reviewed By: Fernando García
Published: 2022-09-24