[1] In addition to the U.S. presidential race, South Dakota voters elected the Class II U.S.

[2] Incumbent Steven Jensen was up for re-election to an eight-year term in the state Supreme Court.

South Dakota Initiated Measure 26, Medical Marijuana Initiative would mandate a program for access to medicinal cannabis for adults with certain pre-existing conditions.

[6][7] A poll by Public Opinion Strategies taken from June 27–30, 2020 and sponsored by the No Way On A Committee (which opposes both measures) showed that support for Amendment A was around 60% and support for Initiated Measure 26 was at 70%.

Constitutional Amendment B allowed the legislature to legalize sports betting in Deadwood.