Primary Rules

Missouri primary election and delegate rules

See Missouri 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 Missouri primaries?

Primary access

Missouri lists multiple primary classifications: Closed: Democratic Presidential and Republican Presidential. Open: Democratic State and Republican State. Eligibility can depend on the party, office, ballot type, and election cycle.

Party and office differences

Closed: Democratic Presidential and Republican Presidential. Open: Democratic State and Republican State.

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

Missouri primary type breakdown

Missouri has an open primary system for State-run Primaries. Voters may choose which primary to vote in privately. The choice does not register the voter with the party. However, the passage of Missouri House Bill 1878 eliminated the state-run presidential preference primary. In order to have a say in selecting the Republican and Democratic presidential...

Closed: Democratic Presidential and Republican Presidential
Open: Democratic State and Republican State

Delegates

Historical 2024 delegate allocation

2024 Democratic Delegates

71 delegate votes

Allocation: Proportional
Threshold: 15% minimum vote required

Missouri's Democratic party will send a total of 71 Delegate Votes and 5 Alternate Delegates to the 2024 Democratic National Convention. 64 of the 71 delegates are pledeged and the remaining 7 are unpledged. The party will use a proportional representation...

2024 Republican Delegates

54 delegate votes

Allocation: Winner-Take-Most
Threshold: 15% threshold

Missouri's Republican party will send a total of 54 Delegate Votes and 51 Alternate Delegates to the 2024 Republican National Convention. All 54 (24 district-level, 27 at-large statewide, 3 RNC) delegates to the Republican National Convention are allocated to...

Sources

Sources and verification links

Questions

Common questions

What type of primary does Missouri use?

Missouri is listed with the following primary type classification: Closed, Open.

Can unaffiliated voters vote in Missouri primaries?

Why does Missouri show more than one primary type?

Missouri can list different classifications for presidential, state, congressional, Democratic, Republican, or nonpartisan contests. The page lists the model breakdown as: Closed: Democratic Presidential and Republican Presidential. Open: Democratic State and Republican State.

How many 2024 presidential delegates are listed for Missouri?

The model lists 71 Democratic delegate votes and 54 Republican delegate votes for the 2024 presidential cycle.

Are Missouri delegate totals current?

The delegate totals shown for Missouri 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 Missouri primary rules?

Use state election materials, party materials, and selected reference links where available. This page links to house.mo.gov - No.1878 and www.ncsl.org - Primary Types.