104th Illinois General Assembly


The 104th Illinois General Assembly, consisting of the Illinois House and Illinois Senate, convened on January 8, 2025 and will adjourn in 2027.
The membership of the 104th General Assembly was decided by the 2024 elections.

Senate

Party composition

23 out of 59 seats were up for election in the 2024 Illinois Senate election. None of those seats changed party, and three new senators were elected.
AffiliationMembers
Democratic Party40
Republican Party19
Total59

House

Party composition

The House of the 104th General Assembly consists of 40 Republicans and 78 Democrats. The party composition reflected the results of the 2024 election, in which seven new representatives were elected and no seats changed parties.
AffiliationMembers
Democratic Party78
Republican Party40
Total118