Attila Valter (born 12 June 1998 in Csömör) is a Hungarian cyclist who currently rides for UCI WorldTeam Team Jumbo–Visma. In 2019 Valter joined the CCC Development Team, having ridden for the Pannon Cycling Team the previous year. At the 2019 Tour de l'Avenir he won the ninth stage to Tignes. For the 2020 season Valter turned professional for the senior CCC Team. That year he won the Tour of Hungary, having finished third in the general classification the previous year. Valter was the first Hungarian winner of the race since 2005. In October 2020, he was named in the startlist for the 2020 Giro d'Italia, making his Grand Tour debut. Valter joined Groupama–FDJ for the 2021 season. At the 2021 Giro d'Italia, he took the overall lead after the sixth stage to San Giacomo, becoming the first Hungarian rider to wear the pink jersey.