Sioux County Genealogy
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Sioux Countywide Sources
1790-1940 U.S. Federal Census World Vital Records
1790-1940 United States Federal Census Archives
1870 Federal Census Surname Index USGenWeb Archives
1875 History: Sioux County, Iowa US Gen Web Archives
1880-1920 and 1940-present Iowa Birth Certificates (order here) Archives
1880-1920 and 1940-present Iowa Death Certificates (order here) Archives
1880-1920 and 1940-present Iowa Marriage Certificates (order here) Archives
Atlas & directory, Sioux County, Iowa Family History Library
BillionGraves Cemetery Records Index Family Search
Birth records, 1880-1928; index 1880-1917 Family History Library
Death records, 1880-1940 Family History Library
Deed records, 1856-1900 Family History Library
Federal Land Patents Bureau of Land Management
Find A Grave Gravestone, Tombstone, and Memorial Photo Collection World Vital Records
Iowa Births and Christenings Index, 1857-1947
Iowa Births and Christenings, 1830-1950 Family Search
Iowa Cemetery Records
Iowa Deaths and Burials, 1850-1990 Family Search
Iowa Marriage Records 1834 - 1900 Archives
Iowa Marriages, 1809-1992 Family Search
Iowa, County Births, 1880-1935 Family Search
Land transfer books, 1857-1919 Family History Library
Marriage index, 1871-1934 ; Marriage records, 1871-1925 Family History Library
Naturalization records, 1871-1951 Family History Library
Old age assistance tax, 1935-1936 Family History Library
Probate records, 1870-1963 ; Probate index, 1870-1984 Family History Library
Sioux County, Iowa cemeteries, index of Sioux County Cemeteries Family History Library
Sioux County, Iowa newspapers, Orange City De Volksvriend : Dutch language newspaper local news section, index Family History Library
Sioux County, Iowa newspapers, nieuwsblad : Dutch newspaper local news section, index Family History Library
Siouxland : a history of Sioux County, Iowa Family History Library
Standard historical atlas of Sioux County, Iowa Family History Library
U.S. Federal Census 1790-1940 Family Search
More Sioux County records are available on the statewide page