The 2021 Indy Lights season was the 35th season of the Indy Lights open wheel motor racing series and the 19th sanctioned by IndyCar, acting as the primary support series for the IndyCar Series.

After going into a hiatus in 2020 because of the COVID-19 pandemic, the season started on April 17 at Barber Motorsports Park and was held over 20 races spanning ten meetings.

[26] This last round was later confirmed to be at Barber Motorsports park, after the IndyCar series moved its season opener there.

[27] The calendar was the first since 2002 to not feature the Freedom 100 at Indianapolis Motor Speedway.

The Toronto round originally scheduled was replaced by a standalone second weekend at Mid-Ohio in October.