Plumas County, California

Founding: 1854
Parent county: Butte
Namesake: The Spanish name for the Feather River
Seat: Quincy (1854–)
Land area: 2,553 square miles
Population (2020): 19,790
Population (historic): 4,363 (1860); 6,180 (1880); 4,657 (1900); 7,913 (1930)
Periods of population growth: pre-1860–1880; 1900–1950; 1960–2000
Subdivisions: One city; 46 CDPs
National Register listings: Six
Pre-1940 residences (estimated): 830 (5.2%)
Pre-1940 housing survival rate: 31.7%
Pre-1860 housing survival rate (1940): 0.9%

Farm housing in disrepair (1950): 7.5%

Nonfarm housing in disrepair (1950): 10.6%

Average farmhouse value (1930): $2,058
Average outbuilding value (1930): $2,337
Average farmhouse size (1940): 5.7 rooms
Number of farms (1920): 150
Average farm size (1920): 228.2 acres
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Quincy

 
Namesake: Quincy, Illinois
Founding: 1854 (platting); 1855 (post office)
Population (2020): 1,630
Pre-1940 residences (estimated): 104 (11.3%)
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Outstanding Buildings

1. Edwin Hosselkus House (c. 1890). 7205 Genesee Road. Eastlake.
2. White Sulphur Springs Ranch (c. 1865). 2350 State Route 89. Greek Revival.