Piet Allegaert (born 20 January 1995) is a Belgian cyclist, who currently rides for UCI WorldTeam Cofidis.

[3] Born in Moorslede, Allegaert signed with UCI Professional Continental team Sport Vlaanderen–Baloise in 2017, after riding with UCI WorldTeam Trek–Segafredo as a stagiaire the previous season.

He finished in 17th place in Paris–Roubaix, his debut classic.

That year, he also won the combativity classification in the BinckBank Tour.

This biographical article related to a Belgian cyclist born in the 1990s is a stub.