Léa Fontaine (born 7 December 2000) is a French judoka. She won the silver medal in the +78 kg event at the 2021 European Judo Championships held in Lisbon, Portugal. She won a medal at the 2021 World Judo Championships. On 12 November 2022 she won a gold medal at the 2022 European Mixed Team Judo Championships as part of team France.