The 2018 Indy Lights season was the 33rd season of the Indy Lights open wheel motor racing series and the 17th sanctioned by IndyCar, acting as the primary support series for the IndyCar Series.

[1] Patricio O'Ward dueled the entire season with his Andretti Autosport teammate Colton Herta, ultimately clinching the title by winning the penultimate race of the season.

O'Ward had nine wins with four other podium finishes while Herta captured four consecutive wins in the first half of the season, including the Freedom 100, but also finished second seven times.

Andretti's Ryan Norman and Juncos Racing's Victor Franzoni each had a single win and finished fourth and fifth in the championship respectively.

Andretti Autosport soundly won the team championship.