Gallia County, Ohio
Founding: 1803 Parent county: Washington Named for: The country of France, whose Latin name is Gallia Seat: Gallipolis (1803–) Land area: 467 square miles Population (2020): 29,220 Population (historic): 4,181 (1810); 17,063 (1850); 28,124 (1880); 27,918 (1900); 23,050 (1930) Periods of population growth: pre-1810–1880; 1890s; 1930s; 1950s; 1970–2000 Subdivisions: Six villages; one CDP; 15 townships Pre-1940 residences (estimated): 1,731 (12.5%) Pre-1940 housing survival rate: 37.1% Pre-1860 housing survival rate (1940): 12.4% Farm housing in disrepair (1950): 13.3% Nonfarm housing in disrepair (1950): 10.8% Average farmhouse value (1930): $725 Average outbuilding value (1930): $471 Average farmhouse size (1940): 5.5 rooms Number of farms (1920): 2,963 Average farm size (1920): 66.5 acres Sources of settlement: Virginia, Pennsylvania, Wa...