Riley County, Kansas

Founding: 1855
Parent county: Unorganized territory

Namesake: Bennet Riley, California military governor
Seat: Ogden (1857–1858); Manhattan (1858–)

Land area: 610 square miles

Population (2020): 71,959

Population (historic): 1,224 (1860); 10,430 (1880); 13,828 (1900); 19,882 (1930)

Periods of population growth: 1860–1890; 1900–1920; 1940–1980; 2000s

Subdivisions: Five cities; one CDP; 14 townships

Pre-1940 residences (estimated): 2,875 (9.5%)
Pre-1940 housing survival rate: 43.8%
Pre-1860 housing survival rate (1940): 7.9%

Farm housing in disrepair (1950): 4.9%

Nonfarm housing in disrepair (1950): 4.5%

Average farmhouse value (1930): $1,835
Average outbuilding value (1930): $1,422
Average farmhouse size (1940): 5.9 rooms
Number of farms (1920): 1,572
Average farm size (1920): 114.9 acres
Sources of settlement: Sweden, Illinois, Ohio, Germany, New York, and Pennsylvania
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Manhattan

Namesake: Manhattan, New York

Founding: 1855 (platting); 1855 (post office); 1857 (incorporation)

Population (2020): 54,100

Population (historic): 1,173 (1870); 3,438 (1900); 10,136 (1930)

Periods of population growth: pre-1870–2010
Pre-1940 residences (estimated): 1,995 (8.6%)
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