William Smith (born 21 March 2004) is a British professional cyclist who rides for UCI Continental team .
From St Albans, Smith raced in Great Britain for Verulam Reallymoving and Oaklands Wolves before joining Trinity Racing. In 2024, he had a tenth-place finish in the Liege-Bastogne-Liege U23 race and a second place in the mountain's classification at the Ronde de l'Isard. He then placed 35th overall in the Giro Next Gen stage race. He signed for in 2024.
In 2025, he won the overall classification at the Tour of South Bohemia, also winning a stage and the best young rider competition.