Sioux County, Iowa

Founding: 1860 (declared in 1851)
Parent county: Unorganized territory
Namesake: The Sioux people
Seat: Calliope (1860–1872); Orange City (1872–)
Land area: 768 square miles
Population (2020): 35,872
Population (historic): 576 (1870); 18,3790 (1890); 25,248 (1910); 26,806 (1930)
Periods of population growth: 1860–1940; 1960–1980; 1990–2020
Subdivisions: 14 cities; 23 townships
Pre-1940 residences (estimated): 3,140 (24.3%)
Pre-1940 housing survival rate: 53.3%

Farm housing in disrepair (1950): 2.4%

Nonfarm housing in disrepair (1950): 2.7%

Average farmhouse value (1930): $2,241
Average outbuilding value (1930): $2,927
Average farmhouse size (1940): 6.8 rooms
Number of farms (1920): 2,801
Average farm size (1920): 158.5 acres
Sources of settlement: Holland, Iowa, Germany, Illinois, Wisconsin, and South Dakota
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Orange City

 
Namesake: William of Orange, English king
Founding: 1870 (platting as Holland); 1871 (post office); 1884 (incorporation)
Population (2020): 6,267
Population (historic): 320 (1880); 1,457 (1900); 1,727 (1930)
Periods of population growth: 1870–1900; 1910–2020
Pre-1940 residences (estimated): 490 (22%)
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Outstanding Buildings

1. Simon Brunskill House (1898). 100 10th Street. Logan. Queen Anne.

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