Oliver County, North Dakota

Founding: 1885
Parent county: Mercer

Namesake: Harry Oliver, North Dakota politician
Seat: Sanger (1885–1902); Center (1902–)

Land area: 723 square miles

Population (2020): 1,877

Population (historic): 464 (1890); 3,577 (1910); 4,262 (1930)

Periods of population growth: 1880–1920

Subdivisions: One city; two territories

Pre-1940 residences (estimated): 138 (13.8%)
Pre-1940 housing survival rate: 27.1%

Farm housing in disrepair (1950): 10.1%

Nonfarm housing in disrepair (1950): 5.6%

Average farmhouse value (1930): $1,102
Average outbuilding value (1930): $1,294
Average farmhouse size (1940): 4.7 rooms
Number of farms (1920): 766
Average farm size (1920): 241.7 acres
Sources of settlement: Minnesota, Russia, Germany, and Iowa
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Center

Namesake: The city's location within Oliver County

Founding: 1902 (platting); 1903 (post office); 1928 (incorporation)

Population (2020): 588

Population (historic): 293 (1930); 509 (1940)

Periods of population growth: pre-1930–1940; 1960–1980
Pre-1940 residences (estimated): 44 (13.3%)
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