The 1970 Formula One season was the 24th season of the FIA's Formula One motor racing. It featured the 21st World Championship of Drivers and the 13th International Cup for F1 Manufacturers. Thirteen races were held between 7 March and 25 October, with the Drivers' Championship won by Jochen Rindt and the Constructors' title by Lotus. Rindt died four races before the end of the season, but had earned enough World Championship points that no other driver managed to surpass his total by the end of the season. It is the only season to date in which the World Drivers' Championship title had been awarded posthumously. Jacky Ickx driving for Ferrari finished the season strongly, but his low 4th-place finish in the penultimate round ensured that Rindt's title lead would stand. In the end, all of Rindt's 45 points came from his five wins in the season.

Karl Jochen Rindt (German: [ˈjɔxn̩ ˈʁɪnt]; 18 April 1942 – 5 September 1970) was a German-born racing driver who competed with an Austrian license during his career, despite having German and not Austrian citizenship. In 1970, he was killed during practice for the Italian Grand Prix and became the only driver to be posthumously awarded the Formula One World Drivers' Championship.

Rindt started motor racing in 1961. Switching to single-seaters in 1963, he was successful in both Formula Junior and Formula Two. In 1964, Rindt made his debut in Formula One at the Austrian Grand Prix, before securing a full drive with Cooper for 1965. After mixed results with the team, he moved to Brabham for 1968 and then Lotus in 1969. It was at Lotus that Rindt found a competitive car, although he was often concerned about the safety of the notoriously unreliable Lotus vehicles. He won his first Formula One race at the 1969 United States Grand Prix. He had a very successful 1970 season, mainly racing the revolutionary Lotus 72, and won five of the first nine races. In practice for the Italian Grand Prix at Monza, he spun into the guardrails after a failure on his car's brake shaft. Rindt was killed owing to severe throat injuries caused by his seat belt; he was pronounced dead while on the way to hospital. As his closest competitor Jacky Ickx was unable to score sufficient points in the remaining races of the season, Rindt was awarded the World Championship posthumously. Rindt left behind his wife, Nina, and a daughter, Natasha.

Overall, he competed in 62 Grands Prix, winning six and achieving 13 podium finishes. He was also successful in sports car racing, winning the 1965 24 Hours of Le Mans paired with Masten Gregory in a Ferrari 250LM.

Rindt was a popular figure in Austria and his success resulted in increased interest in motorsport and Formula One in particular. He hosted a monthly television show titled Motorama and set up a successful exhibition of racing cars in Vienna. During his time in Formula One, he was involved, alongside Jackie Stewart, in a campaign to improve safety in Formula One.