Primary Rules

Illinois primary election and delegate rules

See Illinois 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 Illinois primaries?

Primary access

Illinois 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 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

Illinois primary type breakdown

Illinois does not have a political party registration system. However, in a primary election, you must select one political party ballot to vote or request a non-partisan ballot (public questions only) if available. You have the freedom to change your party choice in each primary election.

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

Delegates

Historical 2024 delegate allocation

2024 Democratic Delegates

174 delegate votes

Allocation: Proportional
Threshold: 15% minimum vote required

In 2024, Illinois's Democratic party will send a total of 174 Delegate Votes and 12 Alternate Delegates to the DNC national convention. Of the 174 delegate votes, 147 Pledged Delegate Votes (96 District-level delegates, 32 At-Large, and 19 PLEOs) and 27...

2024 Republican Delegates

64 delegate votes

Allocation: Winner-Take-All
Threshold: Not specified

All 64 of Illinois' delegates (Winner-Take-All) to the Republican National Convention will be bound to Presidential Candidates based on the results of Illinois Presidential Primary.

Sources

Sources and verification links

Questions

Common questions

What type of primary does Illinois use?

Illinois is listed with the following primary type classification: Partially Open.

Can unaffiliated voters vote in Illinois primaries?

Illinois 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 Illinois?

The model lists 174 Democratic delegate votes and 64 Republican delegate votes for the 2024 presidential cycle.

Are Illinois delegate totals current?

The delegate totals shown for Illinois 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 Illinois primary rules?

Use state election materials, party materials, and selected reference links where available. This page links to www.ilsos.gov - Election process and www.ncsl.org - Primary Types.