The Charles M. Russell National Wildlife Refuge is a National Wildlife Refuge in the U.S. state of Montana on the Missouri River. The refuge surrounds Fort Peck Reservoir and is 915,814 acres (3,706.17 km2) in size. It is the second-largest National Wildlife Refuge in the lower 48 states of the United States, and the largest in Montana. Created in 1936, it was originally called the Fort Peck Game Range. It was renamed in 1963 after Montana artist Charles M. Russell, a famous painter of the American West. In 1976, the "range" was made a "refuge".

Charles Marion Russell, also known as C. M. Russell, Charlie Russell, and "Kid" Russell, was an American artist of the American Old West. He created more than 2,000 paintings of cowboys, Native Americans, and landscapes set in the western United States and in Alberta, Canada, in addition to bronze sculptures. He is known as "the cowboy artist" and was also a storyteller and author. He became an advocate for Native Americans in the west, supporting the bid by landless Chippewa to have a reservation established for them in Montana. In 1916, Congress passed legislation to create the Rocky Boy Reservation.