The 2021 ARCA Menards Series season was the 69th season of the ARCA Menards Series, a stock car racing series sanctioned by NASCAR in the United States. The season began at Daytona International Speedway with the Lucas Oil 200 on February 13 and ended with the Reese's 150 at Kansas Speedway on October 23. Ty Gibbs was crowned the series champion, having won ten times and finished in the top four in 19 of 20 races.

Tyler Randal Gibbs is an American professional stock car racing driver. He competes full-time in the NASCAR Cup Series, driving the No. 54 Toyota Camry XSE for Joe Gibbs Racing. Gibbs was the 2022 NASCAR Xfinity Series champion and 2021 ARCA Menards Series champion. He is the grandson of former NFL coach and NASCAR team owner Joe Gibbs.