Custer County, Idaho

Founding: 1881
Parent counties: Alturas, Idaho, and Lemhi
Namesake: The General Custer Mine, which operated within the county
Seat: Challis (1881–)
Land area: 4,921 square miles
Population (2020): 4,275
Population (historic): 1,870 (1890); 3,001 (1910); 3,162 (1930)
Periods of population growth: pre-1890–1920; 1930s; 1970–2010
Subdivisions: Five cities
National Register listings: 38
Pre-1940 residences (estimated): 230 (7.5%)
Pre-1940 housing survival rate: 36.4%

Farm housing in disrepair (1950): 17.3%

Nonfarm housing in disrepair (1950): 20.1%

Average farmhouse value (1930): $1,152
Average outbuilding value (1930): $746

Average farmhouse size (1940): 4.2 rooms

Number of farms (1920): 379
Average farm size (1920): 130.5 acres
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Challis

 
Namesake: Alvah Challis, platter
Founding: 1876 (platting); 1878 (post office)
Population (2020): 902
Population (historic): 614 (1880); 356 (1890); 338 (1910); 418 (1930)
Periods of population growth: 1870s; 1910s; 1930–1970; 1980s; 2000s
Pre-1940 residences (estimated): 35 (6.6%)
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