Elsa Devassoigne (born 12 October 1969) is a retired French sprinter who specialized in the 200 and 400 metres.

She was born in Schœlcher, Martinique and represented the club CS Fontainebleau.^[1] As a junior, she won a bronze medal in the 4 x 100 metres relay at the 1987 European Junior Championships, together with Anne Leseur, Cécile Peyre and Odiah Sidibé.^[2] The next year she finished eighth in the 4 x 400 metres relay at the 1988 World Junior Championships.^[3]

In relays as a senior she finished fifth at the 1991 World Indoor Championships,^[4] sixth at the 1993 World Championships,^[5] eighth at the 1996 Olympic Games^[1] and second at the 1997 Mediterranean Games.

In the individual distance she won the 1993 Mediterranean Games.^[6] She also competed at the 1992 Olympic Games^[1] and the 1993 World Championships without reaching the final.^[7]

She became French 400 metres champion in 1992 and 1996.^[8] Her personal best time was 51.75 seconds, achieved in 1992.^[1]