Tom Boonen (Dutch pronunciation: ; born 15 October 1980) is a Belgian former road bicycle racer, who competed as a professional between 2002 and 2017, for the U.S. Postal Service and Quick-Step Floors teams. Boonen won the 2005 UCI World Road Race Championships, and was a single-day road specialist with a strong finishing sprint. He won the cycling monuments Paris–Roubaix 4 times and the Tour of Flanders 3 times, among many other prestigious victories, such as prevailing 5 times in the E3 Harelbeke, winning 6 stages of the Tour de France and winning the Overall title of the Tour of Qatar 4 times.
At the start of 2002 Boonen rode for U.S. Postal Service, finishing third in Paris–Roubaix after an early breakaway. Fellow Belgian Johan Museeuw had escaped to a solo victory. Team captain George Hincapie crashed in a slippery section of the course leaving Boonen to ride for himself. Boonen's performance led Museeuw – his childhood hero – to declare Boonen his successor.