Genealogy Today | Directory Sully County U.S. Census (1880 - 1930) Directory > Census Records > U.S.A. > South Dakota U.S. Federal Census records are divided into groups by state, then county, and in many cases by township as well.  1880 Census ADD NEW LISTING  1880 Census - South Dakota - Sully County  from Ancestry.com Information about the 1880 Census  1900 Census ADD NEW LISTING  Population4: 1,715 USGenWeb5: 1900 Census Images - Sully 1900 Census - South Dakota - Sully County  from Ancestry.com Information about the 1900 Census  1910 Census ADD NEW LISTING  Population4: 2,462 1910 Census - South Dakota - Sully County  from Ancestry.com Information about the 1910 Census  1920 Census ADD NEW LISTING  Population4: 2,831 1920 Census - South Dakota - Sully County  from Ancestry.com Information about the 1920 Census  1930 Census ADD NEW LISTING  Population4: 3,852 1930 Census - South Dakota - Sully County  from Ancestry.com Information about the 1930 Census  Additional Information Sully

⁴ Population of Counties by Decennial Census: 1900 to 1990, U.S. Bureau of the Census, 1995

⁵ The USGenWeb Census Project, USGenWeb Archives, 2004.