Charlo, village (1990 pop. 358), Lake co., W Mont., 18 mi/29 km S of Polson, in Flathead Indian Reservation; 47°26'N 114°10'W. Cattle, sheep, hogs; potatoes, corn, oats. Ninepipe Reservoir and Natl. Wildlife Refuge to E; Natl. Bison Range to S. Formerly called Big Flat, then Charlotte.