Primary Rules

Montana primary election and delegate rules

See Montana 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 Montana primaries?

Primary access

Montana is listed with an Open primary classification for Democratic State, Democratic Presidential, Republican Presidential, and Republican State. Voters can generally choose a party primary under the listed rule, subject to state and party requirements.

Party and office differences

Open: Democratic State, Democratic Presidential, Republican Presidential, 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

Montana primary type breakdown

Montana is an open-primary State. Voters may choose which primary to vote in privately. The choice does not register the voter with the party.

Open
Democratic State, Democratic Presidential, Republican Presidential, and Republican State

Delegates

Historical 2024 delegate allocation

2024 Democratic Delegates

22 delegate votes

Allocation
Proportional
Threshold
15% minimum vote required

Montana's Democratic Party will send a total of 22 Delegate Votes and 2 Alternate delegates to the Democratic National Convention. 17 of the 22 delegates are pledeged and the remaining 5 are unpledged. The party will use a proportional representation system...

2024 Republican Delegates

31 delegate votes

Allocation
Delegate-Selection
Threshold
More than 5% of the votes

Montana will send a total of 31 Delegat Votes and 28 Alternate delegates to the Republican National Convention. 3 party leaders, the National Committeeman, the National Committeewoman, and the chairman of the Montana's Republican Party, will attend the...

Sources

Sources and verification links

Questions

Common questions

What type of primary does Montana use?

Montana is listed with the following primary type classification: Open.

Can unaffiliated voters vote in Montana primaries?

Montana is listed with an Open primary classification for Democratic State, Democratic Presidential, Republican Presidential, and Republican State. Voters can generally choose a party primary under the listed rule, subject to state and party requirements.

How many 2024 presidential delegates are listed for Montana?

The model lists 22 Democratic delegate votes and 31 Republican delegate votes for the 2024 presidential cycle.

Are Montana delegate totals current?

The delegate totals shown for Montana 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 Montana primary rules?

Use state election materials, party materials, and selected reference links where available. This page links to politicalpractices.mt.gov - Education-and-Resources and www.ncsl.org - Primary Types.