DescriptionLake County, one of Montana’s youngest counties, was formed in 1923 from portions of Missoula and Flathead counties. Its county seat is Polson. It is named after Flathead Lake, which lies mostly within the county’s borders, as does half of the Flathead Indian Reservation. The county is famous for its cherry orchards.Contributing InstitutionMontana Historical Society Library and ArchivesGeolocation[1] CountyLake County