Below is the list of leading energy companies serving Colorado residential customers.
Black Hills Energy provides electric and natural gas service to more than 1.2 million customers in eight states: Arkansas, Colorado, Iowa, Kansas, Montana, Nebraska, South Dakota and Wyoming.
Xcel Energy is a major U.S. electric and natural gas company. Based in Minneapolis, Minn., Xcel Energy provides energy-related products and services to approximately 3.5 million electricity customers and 1.9 million natural gas customers in Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas and Wisconsin.
United Power is a rural electric cooperative, providing electric service to homes and businesses throughout Colorado's northern front range. The service territory extends from the mountains of Coal Creek and Golden Gate Canyon to the farmlands of Brighton, Hudson and Keenesburg. At the end of 2012, the cooperative reached 70,000 meters representing more than 200,000 customers.
Gunnison County Electric Association (GCEA) is a non-profit, member-owned rural electric cooperative. It was established on September 21, 1938 by a group of local ranchers who wanted to bring electricity to the Gunnison Valley.
Holy Cross Energy, founded in 1939, is member-owned, not-for-profit electric cooperative utility providing electricity, energy products and services to more than 55,000 consumers primarily in the Western Colorado counties of Eagle, Pitkin, and Garfield.