| Election Name: | Illinois Senate elections, 2014 |
| Country: | Illinois |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2012 Illinois State Senate election |
| Previous Year: | 2012 |
| Next Year: | 2016 |
| Seats For Election: | 19 of 59 total seats in the Illinois Senate |
| Majority Seats: | 30 |
| Leader1: | John Cullerton |
| Party1: | Democratic Party (United States) |
| Leaders Seat1: | 6th-Chicago |
| Last Election1: | 40 |
| Seats1: | 39 |
| Seat Change1: | 1 |
| Popular Vote1: | 476,373 |
| Percentage1: | 45.55% |
| Swing1: | 10.08% |
| Leader2: | Christine Radogno |
| Party2: | Republican Party (United States) |
| Leaders Seat2: | 41st-La Grange |
| Last Election2: | 19 |
| Seats2: | 20 |
| Seat Change2: | 1 |
| Popular Vote2: | 569,414 |
| Percentage2: | 54.45% |
| Swing2: | 10.08% |
| President | |
| Posttitle: | President-Elect |
| Before Election: | John Cullerton |
| Before Party: | Democratic Party (United States) |
| After Election: | John Cullerton |
| After Party: | Democratic Party (United States) |
The Illinois State Senate Election of 2014 determined, along with 40 senators not up for re-election, the membership of the 99th Illinois State Senate. The Democratic Party retained its majority, losing one seat with defeat of Mike Jacobs of East Moline by Neil Anderson.[1]
Despite winning a majority of the votes cast in this election, the Republicans remained in the minority, even within the Class of Senators elected this year. There was no possibility of control of the chamber changing hands. Each party only ran 13 candidates, and for control of the Senate to have passed to the Republican Party, it would have to have won eighteen seats of the 19 elected in this election.
| Illinois State Senate Elections, 2014 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Party | Votes | Percentage | % change | Previous Senate | Candidates | Elected | Total seats | +/– | ||||
| Seats held over | Seats up | Total Seats before election | ||||||||||
| Democratic | 476,373 | 45.55% | 10.08% | 28 | 12 | 40 | 13 | 11 | 39 | 1 | ||
| Republican | 569,414 | 54.45% | 10.08% | 12 | 7 | 19 | 13 | 8 | 20 | 1 | ||
| Totals | 1,045,787 | 100.00% | N/A | 40 | 19 | 59 | 26 | 19 | 59 | — | ||