2018Flipped from RepublicanFinal results
2018 election for Illinois Legislative District 27
Illinois State Senate · Illinois
Ann Gillespie (D) won with 52.0% of the vote, defeating Tom Rooney (R) by 4.0 points, a seat Republicans won last time.
Ann GillespieDemocrat · winner
52.0%46,981
Tom RooneyRepublican
48.0%43,375
90,356 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET