CENSUS DATA SOURCES

Sioux County Census Data


1885
Dakota Territory 1885 Census

1885 Morton County Census
(some of Morton became Sioux in 1914)

1900
Transcribed Standing Rock Reservation -
(From Boreman County, South Dakota)

1900, 1920, 1930
Images and Transcribed Indexes on Sioux County Archives

1900-1940
Search FamilySearch.org to get an index (Sioux County included):
1900
1910
1920
1930
1940

1940
National Archives County Census, Maps, Descriptions Images

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1885 - Standing Rock Agency Heads of Families by Bands
Other Census Data


National Archives 1950 Website

Dakota Territory 1870 - 1890
(ancestry.com - fee)

North Dakota 1885 - 1925 Census
(ancestry.com - fee)

Indian Census Rolls 1885 - 1940 Census
(ancestry.com - fee)
Enter "Standing Rock" in Agency Field