Sergio Cresto (USA) (January 19, 1956 – May 2, 1986) was the co-driver of Henri Toivonen at the Lancia Martini team for the 1986 World Rally Championship season.
In 1986 Cresto was Henri Toivonen's co-driver in a Lancia Delta S4. After a strong start to the season, including a win in the Rally Monte Carlo, Toivonen and Cresto were the favourites for the World Championship title. It all came to an end however at the Tour de Corse where they both died as a result of the crash during the eighteenth stage of the rally. Their accident meant that the quick Group B cars were banned after the 1986 season.
He remains the only American to win a WRC event, driver or co-driver.