Alexandre Delettre (born 25 October 1997) is a French professional racing cyclist, who currently rides for UCI Continental team St. Michel–Mavic–Auber93. After riding for Delko as a stagiaire for the latter half of 2019, he signed a two-year neo-pro contract with them in 2021, joining from amateur team Vélo Club Villefranche Beaujolais.

In his first race as a full professional, Delettre made the breakaway on stage 1 of the 2021 Étoile de Bessèges and took the lead in the mountains classification, which he managed to hold on to for the rest of the race.