Gilliam County, Oregon
Founding: 1885 Parent counties: Umatilla and Wasco Namesake: Cornelius Gilliam, Oregon pioneer Seat: Arlington (1885–1890); Condon (1890–) Land area: 1,205 square miles Population (2020): 1,995 Population (historic): 3,600 (1890); 3,701 (1910); 3,467 (1930) Periods of population growth: pre-1890; 1900–1920; 1950s; 1990s; 2010s Subdivisions: Three cities Pre-1940 residences (estimated): 373 (33%) Pre-1940 housing survival rate: 36.5% Farm housing in disrepair (1950): 19.4% Nonfarm housing in disrepair (1950): 11.1% Average farmhouse value (1930): $1,487 Average outbuilding value (1930): $1,828 Average farmhouse size (1940): 5.1 rooms Number of farms (1920): 454 Average farm size (1920): 570.5 acres _________________________________________________________________________________ Condon Namesake: Harvey Condon, surveyor Founding: 1883 (platting); 1884 (post office); ...