Cavalier County, North Dakota

Founding: 1884 (declared in 1873)
Parent county: Pembina
Namesake: Charles Cavaleer, Minnesota librarian
Seat: Langdon (1884–)
Land area: 1,489 square miles
Population (2020): 3,704
Population (historic): 6,471 (1890); 15,659 (1910); 14,554 (1930)
Periods of population growth: pre-1890–1910

Subdivisions: 12 towns; 40 townships
National Register listings: Three
Pre-1940 residences (estimated): 352 (15.2%)
Pre-1940 housing survival rate: 24.4%

Farm housing in disrepair (1950): 9.8%

Nonfarm housing in disrepair (1950): 10.3%

Average farmhouse value (1930): $1,518
Average outbuilding value (1930): $1,722

Average farmhouse size (1940): 5.5 rooms

Number of farms (1920): 2,014
Average farm size (1920): 378.8 acres
Sources of settlement: Canada, Norway, Minnesota, France, Russia, and Germany
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Langdon

 
Namesake: Robert Langdon, railroad official
Founding: 1884 (platting); 1885 (incorporation); 1886 (post office)
Population (2020): 1,909
Population (historic): 291 (1890); 1,214 (1910); 1,221 (1930)
Periods of population growth: pre-1890–1920; 1930–1980

Pre-1940 residences (estimated): 153 (13.2%)

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