Founding: 1923 Parent counties: Flathead and Missoula Namesake: Flathead Lake Seat: Polson (1923–) Land area: 1,490 square miles Population (2020): 31,134 Population (historic): 9,541 (1930); 13,490 (1940) Periods of population growth: pre-1930–1950; 1960–2020 Subdivisions: Two cities; one town; 21 CDPs National Register listings: 10 Pre-1940 residences (estimated): 1,175 (9.8%) Pre-1940 housing survival rate: 38.4% Farm housing in disrepair (1950): 13% Nonfarm housing in disrepair (1950): 9.7% Average farmhouse value (1930): $754 Average outbuilding value (1930): $590 Average farmhouse size (1940): 3.8 rooms Number of farms (1930): 1,197 Sources of settlement: Montana, Minnesota, Iowa, Wisconsin, Illinois, and Missouri _________________________________________________________________________________ Polson Namesake: David Polson, local rancher Founding: 1898 (post office); 1909 (platting); 1910 (incorporation) Population (2020): 5,148 Population (historic):
