Pembina County, North Dakota

Founding: 1867
Parent county: Unorganized territory
Namesake: The Pembina River
Seat: Pembina (1867–1911); Cavalier (1911–)
Land area: 1,119 square miles
Population (2020): 6,844
Population (historic): 1,213 (1870); 14,334 (1890); 14,749 (1910); 14,757 (1930)
Periods of population growth: pre-1870–1900; 1910s; 1930s; 1970s
Subdivisions: 11 cities; 24 townships
National Register listings: 13
Pre-1940 residences (estimated): 700 (18.1%)
Pre-1940 housing survival rate: 29.2%

Farm housing in disrepair (1950): 9.7%

Nonfarm housing in disrepair (1950): 8.1%

Average farmhouse value (1930): $1,568
Average outbuilding value (1930): $1,526

Average farmhouse size (1940): 5.8 rooms

Number of farms (1920): 1,795
Average farm size (1920): 316.1 acres
Sources of settlement: Canada, Iceland, Minnesota, France, Germany, Ireland, and Norway
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Cavalier

 
Namesake: Charles Cavileer, local resident
Founding: 1875 (platting); 1877 (post office); 1902 (incorporation)
Population (2020): 1,246
Population (historic): 671 (1900); 652 (1910); 819 (1920); 850 (1930)
Periods of population growth: pre-1900; 1910s; 1930–1950
Pre-1940 residences (estimated): 119 (14.3%)
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Outstanding Buildings

1. *John Dease Farm (1868). 13565 105th Road. St. Joseph.
2. Hilldale Farm / Sigurdur Melsted Farm (1910). 8735 130th Road. Thingvalla. Queen Anne.
3. *Antoine Gingras House and Trading Post (c. 1845). 12899 105th Road. Walhalla.