Primary Rules

South Dakota primary election and delegate rules

See South Dakota primary election type, who can vote in primaries, and historical 2024 Democratic and Republican delegate allocation details.

Rule and delegate context. This page combines structured primary-rule summaries with selected state, party, national, or archive source links. Presidential delegate counts are historical 2024 cycle data.

Last reviewed: August 21, 2026. Delegate counts are historical 2024 cycle data where listed. Confirm current primary voting rules with state election officials or party materials.

Who Can Vote

Can I vote in South Dakota primaries?

Primary access

South Dakota is listed with a partially open or partially closed primary classification. Eligibility can depend on party registration, unaffiliated status, and the office on the ballot.

Party and office differences

Partially Closed: Democratic State, Republican State, Democratic Presidential, and Republican Presidential.

Before you vote

Primary rules can vary by party, office, and election cycle. Confirm your current ballot eligibility with state election officials, your local election office, or the relevant political party.

Delegate context

The delegate totals on this page are historical 2024 presidential cycle data. They help explain the last presidential allocation cycle but should not be treated as current-cycle delegate counts.

Primary Type

South Dakota primary type breakdown

No person may vote a party ballot at any primary election unless the person is registered as a member of that political party in the precinct in which the person seeks to vote. Any political party in its constitution or bylaws may allow for participation in the party's primary elections by any person who is registered to vote with no party affiliation (NPA).

Partially Closed: Democratic State, Republican State, Democratic Presidential, and Republican Presidential

Delegates

Historical 2024 delegate allocation

2024 Democratic Delegates

19 delegate votes

Allocation: Proportional
Threshold: 15% minimum vote required

The Democratic party will send a total of 19 Delegate Votes (14 Pledged, 5 unpledged) and 2 Alternate delegates to the Democratic National Convention. The party will use a proportional representation system based on the results of the Presidential Primary...

2024 Republican Delegates

29 delegate votes

Allocation: caucus
Threshold: Not specified

The Republican party will send a total of 29 Delegate Votes (3 district-level, 23 at-large, 3 RNC) and 26 Alternate delegates to the Republican National Convention. There is no formal system to relate the presidential preference of the Convention participants...

Sources

Sources and verification links

Questions

Common questions

What type of primary does South Dakota use?

South Dakota is listed with the following primary type classification: Partially Closed.

Can unaffiliated voters vote in South Dakota primaries?

South Dakota is listed with a partially open or partially closed primary classification. Eligibility can depend on party registration, unaffiliated status, and the office on the ballot.

How many 2024 presidential delegates are listed for South Dakota?

The model lists 19 Democratic delegate votes and 29 Republican delegate votes for the 2024 presidential cycle.

Are South Dakota delegate totals current?

The delegate totals shown for South Dakota are historical 2024 presidential cycle data where listed. Confirm current-cycle delegate plans with official party materials or state election sources.

Where can I verify South Dakota primary rules?

Use state election materials, party materials, and selected reference links where available. This page links to Voting in South Dakota and www.ncsl.org - Primary Types.