United States House elections in Illinois, 2026 (March 17 Republican primaries)

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	U.S. House elections in Illinois
	Primary date ; March 17, 2026
	General election date ; November 3, 2026
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	2026 U.S. Senate Elections; 2026 U.S. House Elections

The U.S. House of Representatives elections in Illinois are scheduled on November 3, 2026. Voters will elect 17 candidates to serve in the U.S. House from each of the state's 17 U.S. House districts. The primary is March 17, 2026. The filing deadline is November 3, 2025.

Candidate filing deadline	Primary election	General election
November 3, 2025	March 17, 2026	November 3, 2026

A primary election is an election in which registered voters select a candidate that they believe should be a political party's candidate for elected office to run in the general election. They are also used to choose convention delegates and party leaders. Primaries are state-level and local-level elections that take place prior to a general election. In Illinois, state law provides for a closed primary where a voter must be affiliated with a party to vote in that party's primary. However, voters state their affiliation at the polls and any voter may change their affiliation on the day of the primary. A voter's eligibility to vote a party's ballot may be challenged.^[1]

For information about which offices are nominated via primary election, see this article.

This page focuses on Illinois' Republican primaries for the U.S. House. For more in-depth information on the state's Democratic primaries and the general election, see the following pages:

Candidates and election results

Note: The following list includes official candidates only. Ballotpedia defines official candidates as people who:

Register with a federal or state campaign finance agency before the candidate filing deadline
Appear on candidate lists released by government election agencies