2018 in NASCAR - Wikipedia
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In 2018, NASCAR sanctioned three national series and six regional touring series.
- 2018 Monster Energy NASCAR Cup Series – The top racing series in NASCAR
- 2018 NASCAR Xfinity Series – The second-highest racing series in NASCAR
- 2018 NASCAR Camping World Truck Series – The third-highest racing series in NASCAR
- 2018 NASCAR K&N Pro Series West – One of the two K&N Pro Series
- 2018 NASCAR K&N Pro Series East – One of the two K&N Pro Series
- 2018 NASCAR Whelen Modified Tour – The modified tour of NASCAR
- 2018 NASCAR Pinty's Series – The top NASCAR racing series in Canada
- 2018 NASCAR PEAK Mexico Series – The top NASCAR racing series in Mexico
- 2018 NASCAR Whelen Euro Series – The top NASCAR racing series in Europe