Sully County, South Dakota Genealogy

United States South Dakota Sully County

Guide to Sully County, South Dakota ancestry, genealogy and family history, birth records, marriage records, death records, census records, family history, and military records.

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County Courthouse
Sully County Courthouse 700 Ash Avenue Onida, SD 57564 Phone: 605.258.2535 Register of Deeds has birth, marriage, death, burial and land records; Clerk Courts has probate and court records

Sully County, South Dakota Record Dates

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 * width="84%" bgcolor="#e4d8e5" align="center" colspan="7" | Beginning Dates for Major County Records
 * width="12%" bgcolor="#e4d8e5" align="center" | Birth*
 * width="12%" bgcolor="#e4d8e5" align="center" | Marriage
 * width="12%" bgcolor="#e4d8e5" align="center" | Death*
 * width="12%" bgcolor="#e4d8e5" align="center" | Court
 * width="12%" bgcolor="#e4d8e5" align="center" | Land
 * width="12%" bgcolor="#e4d8e5" align="center" | Probate
 * width="12%" bgcolor="#e4d8e5" align="center" | Census
 * width="12%" align="center" |
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 * width="12%" align="center" |1880
 * colspan="7"|
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 * width="12%" align="center" |1880
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Record Loss
There is no known history of courthouse disasters in this county.

Boundary Changes

 * 1873--Sully County was created 8 January 1873 from Buffalo County.
 * County seat: Onida
 * Interactive Formation Boundary Map of North Dakota - shows boundary changes for South Dakota Counties
 * South Dakota Historical Boundary Changes - list of all boundary changes by county provided by Newberry Library

Populated Places

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Census Records
1905, 1915, 1925, 1935, and 1945 censuses may include unique information: Ethnic Background, Maiden Name, Church Affiliation and Military Service
 * 1905 — at FamilySearch Historical Records — index and images
 * 1915 — at FamilySearch Historical Records — index and images
 * 1925 — at FamilySearch Historical Records — index and images
 * 1935 — at FamilySearch Historical Records — index and images
 * 1945 — at FamilySearch Historical Records — index and images

Land and Property Records
Online Land Records


 * Land Patent Search - index to federal patents and homesteads on the Bureau of Land Management website, some images available
 * 1796 - 1907 - U.S. General Land Office Records, 1796-1907 at Ancestry - index, info taken from Bureau of Land Management website
 * 1861 - 1936 - U.S. Homestead Records 1861-1936 at Ancestry.com - ($), index and images

Local Histories

 * 75 years of Sully County history, 1883-1958. 1959?. By Mrs. E. L. Thompson. [Onida, South Dakota] : Onida Watchman. Online at: ;.
 * History of Sully County. 1990. By Mrs. Bessie B. Lumley. Salt Lake City, Utah : Filmed by the Genealogical Society of Utah. Online at:, Ancestry-($);.

Military Records

 * 1861-1941 - at FamilySearch — index and images

Probate Records
Online Records
 * 1800 – 1985 North Dakota and South Dakota Wills and Probate Records 1800-1985 at Ancestry.com — index and images $

Websites

 * USGenWeb project. May have maps, name indexes, history or other information for this county. Select the state, then the county.