Crook County, Wyoming

Founding: 1885 (declared in 1875)
Parent counties: Albany and Laramie

Namesake: George Crook, U.S. army officer
Seat: Sundance (1885–)

Land area: 2,854 square miles

Population (2020): 7,181

Population (historic): 2,338 (1890); 3,137 (1900); 5,492 (1910); 5,524 (1920); 5,333 (1930)

Periods of population growth: 1880–1910; 1930s; 1970s; 1990–2020

Subdivisions: Four towns; one CDP

National Register listings: 13

Pre-1940 residences (estimated): 320 (8.8%)
Pre-1940 housing survival rate: 19.5%

Farm housing in disrepair (1950): 21.1%

Nonfarm housing in disrepair (1950): 12.2%

Average farmhouse value (1930): $706
Average outbuilding value (1930): $727
Average farmhouse size (1940): 4 rooms
Number of farms (1920): 1,093
Average farm size (1920): 115.8 acres
Sources of settlement: Nebraska, Iowa, Missouri, South Dakota, and Illinois
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Sundance

Namesake: A ceremony performed by Plains tribes

Founding: 1879 (platting); 1882 (post office); 1887 (incorporation)

Population (2020): 1,032

Population (historic): 515 (1890); 281 (1910); 369 (1930)

Periods of population growth: pre-1890; 1910–1950; 1960s
Pre-1940 residences (estimated): 126 (18.5%)
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