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- source: Getty Thesaurus of Geographic Names
- source: Family History Library Catalog
- the text in this section is copied from an article in Wikipedia
Sioux County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 35,872. Its county seat is Orange City. Its largest city is Sioux Center.
Timeline
| Date | Event | Source
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| 1851 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1856 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1860 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1860 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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| 1870 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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| 1871 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1871 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1880 | Birth records recorded | Source:Red Book: American State, County, and Town Sources
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Population History
- source: Source:Population of States and Counties of the United States: 1790-1990
| Census Year | Population
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| 1860 | 10
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| 1870 | 576
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| 1880 | 5,426
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| 1890 | 18,370
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| 1900 | 23,337
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| 1910 | 25,248
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| 1920 | 26,458
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| 1930 | 26,806
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| 1940 | 27,209
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| 1950 | 26,381
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| 1960 | 26,375
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| 1970 | 27,996
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| 1980 | 30,813
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| 1990 | 29,903
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Cemeteries
Cemeteries of Sioux County, Iowa, United States
Research Tips
External links
www.rootsweb.com/~iasioux/
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