The 1975 World Rally Championship was the third season of the Fédération Internationale de l'Automobile (FIA) World Rally Championship (WRC). 10 events were included on the schedule, including the return to the series of the famous Monte Carlo and Swedish rallies after a one season absence of those events. Both North American events were removed from the schedule however. Other returning entries to the schedule included the Acropolis Rally in Greece, which would become a staple of the WRC circuit to this day, and the Rallye du Maroc.
Lancia, with its powerful Stratos HF, continued its dominance despite struggling with reliability. Lancia won four rallies during the season however, outpacing competitors Fiat and Alpine-Renault. The battle for second place in the season was ultimately determined by a single point, with Fiat outscoring Alpine-Renault 61 points to 60, while Opel's Ascona made a strong bid to be competitive, scoring 58 points.
From 1973 to 1978, the WRC only awarded a championship for manufacturers. Scoring was given for the highest placing entry for each manufacturer. Thus if a particular manufacturer was to place 2nd, 4th, and 10th, they would receive points for 2nd place only. However, the manufacturer would still gain an advantage in scoring from its other entries, as the points for the 4th and 10th place entries would be denied to other manufacturers.
