The 1984 FIA Formula One World Championship was the 38th season of Fédération Internationale de l'Automobile (FIA) Formula One motor racing. Drivers and teams competed in sixteen Grands Prix for the World Drivers' and World Constructors' championship titles. The season ran from 5 March to 21 October.
In the Drivers' Championship, the season became a duel between McLaren drivers Alain Prost and Niki Lauda. Prost won seven races to Lauda's five, including the last two races of the season, but Lauda eventually prevailed by half a point – the smallest margin in Formula One history. It was Lauda's third title and his first since . McLaren comfortably won the Manufacturers' Championship, their first since .
To date, this is the last championship for an Austrian Formula One driver. It was the second time (after Denny Hulme had done likewise 1967) and to date, last time in World Championship history that the eventual champion did not score a pole position during the entire season.