Key to Abbreviations:
B Census in book format
F Census on microfilm
IB Index in book format
IF Index on microfilm
IT Territorial index in book format
M Miracode on microfilm
S Soundex on microfilm
T Territorial census in book format
V Veterans schedule
* Partial index
NOTE: The only portion of the 1890 Federal Population Census for South Dakota to survive includes: Union County, Jefferson Township
