2021 Formula Regional Americas Championship

[1] Kyffin Simpson took the drivers' championship at the last round at the Circuit of the Americas, while TJ Speed Motorsports secured the teams' title.

All drivers competed with Honda-powered Ligier JS F3 cars on Hankook tires.

[18] A pre-season test was held at Virginia International Raceway as well as a Winter Cup at the road course of Homestead-Miami Speedway in February.

[19][20] Two rounds at Sonoma and Laguna Seca were later replaced by Road America and Brainerd International Raceway.

[21] The round at Circuit Trois-Rivières in Quebec, Canada - the planned first international event for the series - was cancelled due to border restrictions and replaced with a round at Mid-Ohio Sports Car Course.