Saturday 14 March 2020: Regional / Legislative District Caucuses meet in each of the state's 35 Legislative Districts to elect delegates to the Congressional District Caucus.

Saturday 21 March 2020: The Congressional District caucus meets in Pierre to slate National Convention Congressional District delegates, for each Presidential Preference and Uncommitted, to appear on the primary ballot.

This Presidential Primary coincides with a state/local primary. These coinciding primaries tend to have an impact upon voter turnout.

Participation in South Dakota's delegate selection process is open to all voters who wish to participate as Democrats. Voters registered as Democrats, Independents, or No Party Affiliation may participate.

South Dakota Primary. Hours reportedly 7:00a-7:00p CDT (1200-0000 UTC) / 7:00a-7:00p MDT (1300-0100 UTC). Delegate Pledging: Proportional Primary. Voter Eligibility: Modified Primary.

Primary
Source: Secretary of State.
Status: Official. Retrieved: Saturday 11 July 2020.
Included in Nationwide vote.

Tuesday 2 June 2020: 16 of 21 delegates to the Democratic National Convention are pledged to presidential contenders based on the primary results statewide as South Dakota has only a single at-large congressional seat. A mandatory 15 percent threshold is required in order for a presidential contender to be pledged National Convention delegates at either the congressional district or statewide level. How the Democratic Proportional Delegate Allocation Math works.

• 10 district delegates are to be pledged proportionally to presidential contenders based on the primary results in the State's single at-large congressional district. District delegates are pre-slated by the Presidential contenders.
• 6 delegates are to be pledged to presidential contenders based on the primary vote statewide.
  • 4 at-large National Convention delegates
  • 2 Pledged PLEOs

Primary
Source: Secretary of State.
Status: Official. Retrieved: Saturday 11 July 2020.

Saturday 20 June 2020: State Convention / State Party Central Committee in TBD.

National Convention Pledged PLEO and At-Large delegates are elected according to the statewide primary vote.

The remaining 5 National Convention delegates consist of

• 5 Unpledged PLEO delegates:
• 4 Democratic National Committee members.
• 0 Members of Congress (0 Senators and 0 Representatives).
• 0 Governors.
• 1 Distinguished Party Leader (former Senate Majority Leader Thomas Andrew "Tom" Daschle).

These 5 delegates and will go to the Democratic National Convention officially "Unpledged".