2018 general · November 6, 2018
2018 Illinois State Senate election results, district by district
Every Illinois State Senate district in the 2018 general election: winners, margins, unopposed seats and seats that changed party.
Seats after the election
Democrats controlled the chamber · 59 seats
After the electionD 40 · R 19
Races39
Changed party3
Unopposed46%18 races
Incumbents defeated2
Every district
D 24 · R 15
Illinois State Senate
Results are each source's final count; margins are the winner's lead over the runner-up in points of the vote. Source: MIT Election Data and Science Lab