2020 in NASCAR

In 2020, NASCAR sanctioned four national series:
 * 2020 NASCAR Cup Series – the top racing series in NASCAR
 * 2020 NASCAR Xfinity Series – the second-highest racing series in NASCAR
 * 2020 NASCAR Gander RV & Outdoors Truck Series – the third-highest racing series in NASCAR
 * 2020 ARCA Menards Series – the top racing series in ARCA (owned by NASCAR)

Touring series

 * eNASCAR iRacing Pro Invitational Series – The iRacing series that all-stars competed in during the COVID-19 pandemic.
 * 2020 ARCA Menards Series West – One of the two regional ARCA Series
 * 2020 ARCA Menards Series East – One of the two regional ARCA Series
 * 2020 NASCAR Whelen Modified Tour – The modified tour of NASCAR
 * 2020 NASCAR Whelen Euro Series – The top NASCAR racing series in Europe