The 2021 ARCA Menards Series East was the 35th season of the ARCA Menards Series East, a regional stock car racing series sanctioned by NASCAR in the United States. The season began on February 8 at New Smyrna Speedway with the Jeep Beach 175 and ended on September 16 at Bristol Motor Speedway with the Bush's Beans 200. Sammy Smith and Joe Gibbs Racing won the series championship. JGR's No. 18 car, driven by Smith and Ty Gibbs, won all but one race during the season.
2019 and 2020 series champion Sam Mayer did not go for a three-peat, as he moved up to the Xfinity Series in 2021, driving for JR Motorsports after his 18th birthday on June 26.[1]