Avista is an electric and natural gas utility company in the United States. Its business is organized into two segments, Avista Utilities and Alaska Electric Light and Power Company (AEL&P).
The Avista Utilities segment provides electric distribution and transmission, and natural gas distribution and transmission services in parts of eastern Washington and northern Idaho
Natural gas distribution services in parts of northeastern and southwestern Oregon, as well as generates electricity in Washington, Idaho, Oregon, and Montana. This segment also engages in the supply of electricity to customers in Montana; and wholesale purchase and sale of electricity and natural gas.
The Alaska Electric Light and Power Company segment offers electric services in Juneau, Alaska. The company generates electricity through hydroelectric, thermal, wind, and solar generation facilities.
As of December 31, 2025, it supplied retail electrical services to approximately 429,000 customers. Its portfolio also includes retail natural gas services to approximately 386,000 customers, and electrical energy to approximately 17,600 customers.
It also operates five hydroelectric generation facilities with a capacity of 102.7 MW; and four diesel generating facilities with a capacity of 107.5 MW. Additionally, it engages in venture fund investments, real estate investments, and investments. Incorporated in 1889 and headquartered in Spokane, Washington, Avista was formerly known as Washington Water Power before rebranding in January 1999.