Jean-Baptiste Mourcia (born 30 September 1999) is a French modern pentathlete.

He was a bronze medalist at the 2022 European Championships and competed at the 2024 Paris Olympics.

He competed as a regional level swimmer but discovered modern pentathlon in 2013, at the Aix Université Club.

[4] He finished third in the mixed relay legs in Budapest and Sofia during the 2023 Modern Pentathlon World Cup.

He also had a fourth place finish at the World Championships in the men's relay with Ugo Fleurot.