The 1991 Firestone Indy Lights Championship consisted of 12 races. Éric Bachelart won four races on his way to the championship. He was one of six different winners on the season.
Held April 14 at Long Beach, California Street Course. Éric Bachelart won the pole.
Top Five Results
Held April 21 at Phoenix International Raceway. Mark Smith won the pole.
Top Five Results
Held June 2 at The Milwaukee Mile. John Marconi won the pole.
Top Five Results
Held June 16 at the Detroit street circuit. Éric Bachelart won the pole.
Top Five Results
Held June 23 at Portland International Raceway. P. J. Jones won the pole.
Top Five Results
Held July 7 at Burke Lakefront Airport. Mark Smith won the pole.
Top Five Results
Held July 14 at the Meadowlands Sports Complex. Mark Smith won the pole.
Top Five Results
Held July 21 at Exhibition Place. Éric Bachelart won the pole.
Top Five Results
Held August 25 at the Denver, Colorado street circuit. Robbie Groff won the pole.
Top Five Results
Held September 15 at The Mid-Ohio Sports Car Course. Robbie Buhl won the pole.