The Illinois State Senate Election of 2016 determined, along with 19 senators not up for re-election, the membership of the 100th Illinois State Senate. The Democratic Party retained its majority, losing two seats - the 47th district in Western Illinois, and the 59th in the State's South - which were both won by Republicans.

Quick Facts 40 of 59 seats in the Illinois Senate 30 seats needed for a majority, Majority party ...

2016 Illinois Senate elections

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40 of 59 seats in the Illinois Senate 30 seats needed for a majority
Majority party Minority party   Leader John Cullerton Christine Radogno Party Democratic Republican Leader's seat 6th-Chicago 41st-La Grange Last election 39 20 Seats won 37 22 Seat change 2 2 Popular vote 1,906,007 1,299,861 Percentage 59.45% 40.55% Swing 13.90% 13.90%
Results by gains and holds Results by winning party vote share Results:      Republican gain      Democratic hold      Republican hold      No election Vote Share:      50–60%      60–70%      >90%      50–60%      60–70%      >90%
President before election John Cullerton Democratic President-Elect John Cullerton Democratic

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