The 2021 AMA National Speedway Championship Series was staged over two rounds, held at Owego, New York (September 5)[1] and Auburn, California (September 25).[2] Three rounds were initially scheduled, however the first round at Greene, New York was cancelled due to poor track conditions.[3] It was also the first championship since 2019, after the 2020 series was not held due to the Covid-19 pandemic.[4]
It was won by Max Ruml, who beat Gino Manzares and Billy Janniro to the title. It was the first time Ruml had won the title, having previously finished as runner-up on four separate occasions.