2021 eNASCAR iRacing Pro Invitational Series

The 2021 eNASCAR iRacing Pro Invitational Series was the second and final season of the eNASCAR iRacing Pro Invitational Series, a series of iRacing sim racing events originally organized for NASCAR drivers to compete in after its 2020 seasons were put on hold due to the COVID-19 pandemic.

After the success of the series, NASCAR decided to bring it back on a more permanent basis in 2021, although this time, the races, 10 in total, would be held on Wednesday nights at least once a month. Additionally, Fox, which broadcast all of the races in the series in 2020, would be joined by NBC, the other channel that broadcasts real-life NASCAR races, this season, with each channel airing five races apiece. Fox and NBC would choose the racetracks that their races would be on. The series began on March 24 with a race at the virtual version of dirt Bristol Motor Speedway.

The Saturday Night Thunder series of races for drivers in NASCAR's lower series did not return in 2021. However, before each race, at least 10 drivers from NASCAR's lower series were selected to be on a ballot for a fan vote for one starting spot in each eNASCAR iRacing Pro Invitational Series race.