2018Flipped from RepublicanFinal resultsIncumbent defeated
2018 election for Illinois Representative District 48
Illinois House of Representatives · Illinois
Terra Costa Howard (D) won with 53.5% of the vote, defeating Peter Breen (R) by 7.0 points, a seat Republicans won last time.
Terra Costa HowardDemocrat · winner
53.5%26,820
Peter BreenRepublican · incumbent
46.5%23,313
50,133 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