The 2018 FIA Formula One World Championship was the motor racing championship for Formula One cars and the 69th running of the Formula One World Championship. Formula One is recognised by the governing body of international motorsport, the Fédération Internationale de l'Automobile (FIA), as the highest class of competition for open-wheel racing cars. Drivers and teams competed in twenty-one Grands Prix for the World Drivers' and World Constructors' championship titles.
In 2018, the championship saw the introduction of a new cockpit protection device, known as the "halo". The introduction of the halo was the first stage of a planned rollout that would see the device adopted in all FIA-sanctioned open wheel series by 2020.