The Dallara F2 2018 was an open-wheel racing car developed by Italian manufacturer Dallara for use in the FIA Formula 2 Championship, a feeder-series for Formula One until being replaced by the Dallara F2 2024 from the 2024 season onwards. The F2 2018 was the second car used by the FIA Formula 2 Championship and was introduced for the 2018 championship as a replacement for the aging Dallara GP2/11 chassis. As the Formula 2 Championship is a spec series, the F2 2018 was raced by every team and driver competing in the series as a cost-control method. The F2 2018 was Dallara's first ever turbo-powered Formula 2 car and also the first turbo-powered Formula 1 junior feeder-series car since the Dallara GP3/10 in the GP3 Series.

The 2018 FIA Formula 2 Championship was the fifty-second season of the second-tier of Formula One feeder championship and also second season under the moniker of FIA Formula 2 Championship, a motor racing championship for Formula 2 cars that is sanctioned by the Fédération Internationale de l'Automobile (FIA). It is an open-wheel racing category that serves as the second tier of formula racing in the FIA Global Pathway. The category run in support of the 2018 FIA Formula One World Championship, with each of the twelve rounds running in conjunction with a Grand Prix. It was the first FIA Formula 2 season to feature a new chassis and engine package.