Big Arm, MT

Big Arm is a census-designated place in Lake County, Montana, United States. The 2020 census counted 218 residents. The town is situated on the south side of Big Arm, a large bay on Flathead Lake, hence its name. The post office opened in 1911, with Marion F. The through line in Big Arm is the way its history and present-day settings remain visible on the same map. Big Arm makes the most sense through those concrete details, with its history still visible in the settings people use today. Big Arm is located in northwestern Lake County. The census-designated place contains the settlement of Big Arm along the southern shore of Flathead Lake's Big Arm, as well as undeveloped grassland to the south, up to the base of an unnamed 5,100-foot mountain.