Marie Jean-Yann de Grace (born 19 May 1995) is a sprinter from Mauritius.^[3] He represented his country in the 60 metres at the 2018 World Indoor Championships reaching the semifinals.

International competitions

Year	Competition	Venue	Position	Event	Notes
Representing  Mauritius
2013	African Junior Championships	Bambous, Mauritius	4th	100 m	10.81
			2nd	4 × 100 m relay	40.86
2014	African Championships	Marrakech, Morocco	30th (h)	100 m	10.78
			22nd (h)	200 m	21.49
2017	Jeux de la Francophonie	Abidjan, Ivory Coast	7th	100 m	10.58
2018	World Indoor Championships	Birmingham, United Kingdom	29th (h)	60 m	6.82
	Commonwealth Games	Gold Coast, Australia	33rd (h)	100 m	10.53
			27th (h)	200 m	21.18
	African Championships	Asaba, Nigeria	27th (h)	100 m	10.83
			32nd (h)	200 m	21.82

Personal bests

Outdoor

• 100 metres – 10.37 (-1.1 m/s, Bern 2017)
• 200 metres – 21.09 (+1.5 m/s, Réduit 2015)

Indoor

• 60 metres – 6.70 (Magglingen 2018)
• 200 metres – 20.95 (Aubiére 2018)