Voting is expected to take place throughout the state from 7:00 a.m. until 7:00 p.m. local time . In the semi-closed primary , candidates must meet a threshold of 15 percent statewide ( coterminous with the state 's sole congressional district ) in order to be considered viable . The 19 pledged delegates to the 2020 Democratic National Convention will be allocated proportionally on the basis of the results of the primary . Of the 19 pledged delegates , 9 are district-level delegates and another 2 are allocated to party leaders and elected officials ( PLEO delegates ) , in addition to 3 at-large pledged delegates . These delegate totals do not account for pledged delegate bonuses or penalties from timing or clustering
2020 Democratic National Convention
2020 Democratic National Convention
2020 South Dakota Democratic primary