Marjorie Delassus (born 26 March 1998) is a French slalom canoeist who has competed at the international level since 2016.

Delassus competed at the delayed 2020 Summer Olympics in Tokyo, finishing fourth in the C1 event.

At the 2020 European Championships, she won a silver medal in the K1 team event alongside Camille Prigent and Lucie Baudu.

[2] At the 2021 European Championships she won the C1 team bronze medal with Lucie Prioux and Angèle Hug.

In 2019 she finished fourth in the C1 event at the U23 World Championships and in October 2020, she qualified for the delayed 2020 Tokyo Olympics.