Treasure County, Montana

Founding: 1919
Parent county: Rosebud
Namesake: A promotional name
Seat: Hysham (1919–)
Land area: 977 square miles
Population (2020): 762
Population (historic): 1,990 (1920); 1,661 (1930); 1,499 (1940)
Periods of population growth: pre-1920; 2010s

Subdivisions: One town
National Register listings: Three
Pre-1940 residences (estimated): 104 (22.2%)
Pre-1940 housing survival rate: 34%

Farm housing in disrepair (1950): 19.4%

Nonfarm housing in disrepair (1950): 10.6%

Average farmhouse value (1930): $739
Average outbuilding value (1930): $671

Average farmhouse size (1940): 3.8 rooms

Number of farms (1920): 330
Average farm size (1920): 136.2 acres
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Hysham

 
Namesake: Charles Hysham, local rancher
Founding: 1907 (post office); 1908 (platting); 1916 (incorporation)
Population (2020): 276
Population (historic): 360 (1920); 258 (1930); 392 (1940)
Periods of population growth: pre-1920; 1930–1960; 1970s

Pre-1940 residences (estimated): 49 (27.2%)
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