The 2018 NASCAR Whelen Euro Series is the tenth Racecar Euro Series season, and the sixth under the NASCAR Whelen Euro Series branding. The season consisted of six meetings – with two races at each meeting – starting on 14 April at Circuit Ricardo Tormo in Valencia, and ending on 21 October at Circuit Zolder in Belgium. Alon Day and Thomas Ferrando entered the season as the defending champion in Elite 1 and Elite 2 respectively.
In the Elite 1 class, Alon Day successfully defended his Elite 1 title, winning the championship by 28 points over Frédéric Gabillon. In the Elite 2 class, Ulysse Delsaux scored his first NASCAR Euro Series title, ahead of Go Fas Racing's Florian Venturi by six points. RDV Compétition won the team's championship title, while Toyota won their first Euro Series manufacturer's title.