San Juan County, Colorado

Founding: 1876
Parent counties: Hinsdale and La Plata

Namesake: The San Juan Mountains
Seat: Silverton (1876–)

Land area: 387 square miles

Population (2020): 705

Population (historic): 1,087 (1880); 2,342 (1900); 1,935 (1930)

Periods of population growth: pre-1880–1910; 1920s; 2000s

Subdivisions: One town

Pre-1940 residences (estimated): 273 (36.7%)
Pre-1940 housing survival rate: 58.9%

Housing in disrepair (1950): 11.3%

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Silverton

Namesake: The region's silver deposits

Founding: 1874 (platting); 1874 (incorporation); 1875 (post office)

Population (2020): 622

Population (historic): 1,360 (1900); 2,153 (1910); 1,150 (1920)

Periods of population growth: pre-1900–1910; 1920s; 1940s; 2000s
Pre-1940 residences (estimated): 259 (50.8%)

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