Amador County, California

Founding: 1854
Parent counties: Calaveras and El Dorado
Namesake: José María Amador, California rancher
Seat: Jackson (1854–)
Land area: 595 square miles
Population (2020): 40,474
Population (historic): 10,930 (1860); 11,384 (1880); 11,116 (1900); 8,494 (1930)
Periods of population growth: pre-1860; 1870s; 1890s; 1920–2020

Subdivisions: Five cities; 13 CDPs
Pre-1940 residences (estimated): 1,722 (9.4%)
Pre-1940 housing survival rate: 47.6%
Pre-1860 housing survival rate (1940): 2.3%

Farm housing in disrepair (1950): 16.2%

Nonfarm housing in disrepair (1950): 11.3%

Average farmhouse value (1930): $1,149
Average outbuilding value (1930): $1,033

Average farmhouse size (1940): 5.4 rooms

Number of farms (1920): 479
Average farm size (1920): 125.2 acres
Sources of settlement: Italy, England, Austria, Ireland, Missouri, Germany, Ohio, New York, and Illinois
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Jackson

 
Namesake: Alden Jackson, local lawyer
Founding: 1848 (founding); 1851 (post office); 1905 (incorporation)
Population (2020): 5,019
Population (historic): 1,040 (1880); 2,035 (1910); 2,005 (1930)
Periods of population growth: pre-1910; 1920–1940; 1960–2020

Pre-1940 residences (estimated): 308 (13.1%)
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