Matthieu Ladagnous (born 12 December 1984) is a French former road and track racing cyclist, who competed as a professional from 2006 to 2023, spending his entire career with UCI WorldTeam Française des Jeux.

Born in Pau, Ladagnous became junior world champion at the madison in Melbourne, Australia in 2002 with his partner Tom Thiblier.

At the team pursuit he, Anthony Langella, Fabien Sanchez and Mickaël Mallie won the gold medal and became national elite champions.

He decided to focus mainly at the road for the 2006 season, but won another team pursuit gold with Mickaël Delage, Jonathan Mouchel, Mikaël Preau and Sylvain Blanquefort.

[5] In January 2023, entering his eighteenth season as a professional – all with Groupama–FDJ and its preceding iterations – Ladagnous announced that he would retire from the sport at the end of the year.