The Cordero Rojo Mine is a coal mining complex located in the state of Wyoming in the United States, in the coal-rich Powder River Basin.

The mine is of open pit construction and employs several dragline excavators.

Two coal-processing facilities are located on-site, and crushed coal is shipped by rail to electric utility customers in the south and west of the United States.

The mine was formerly owned by the mining company Rio Tinto Group, thru its subsidiary Rio Tinto Energy America.

[1] The mine produced between 34 and 36 million tons of coal per year in the years 2004 to 2006,[1] over 40 million tons of coal in 2007, and 22.8 million tons in 2015, making the Cordero Rojo the fourth-largest producer of coal in the United States.