The Fort Peck Reservation is located in the northeastern Montana and includes Daniel's, Richland, Roosevelt, Sheridan, and Valley counties with 89 percent of the Indian people residing in Roosevelt County. For FY 1996 the Official IHS Population for the Fort Peck Service Unit consists of 7,304 Indian people. Annual rain fall is 12.72 inches and the climate is correspondingly dry. Summers are warm, but seldom oppressive. Sunny weather predominates during the warmer season, but interruptions in the form of thunder showers do occur, mostly in June and July, and in the afternoon or early evening.
Winters are quite cold.
Poplar is the second largest town on the reservation and approximately 3,698 Indian people reside here. Wolf Point is the largest town on the reservation and approximately 2,949 Indian people reside here.