Mary-Estelle Mahuk

Mary-Estelle Mahuk (née Kapalu born 11 August 1966 in Tanna) is a Vanuatuan athlete.

Mahuk competed in three Summer Olympics for her country, at the 1992 Summer Olympics she competed in two events, in the 400 metres she finished 7th in her heat, then in the 400 metres hurdles she again finished 7th in her heat so in neither did she qualify for the next round. Four years later she went to Atlanta for the 1996 Summer Olympics, she entered the 400 metres hurdle and this time finished 6th in her heat but again failed to qualify, then she went to the 2000 Summer Olympics and in the 400 metres hurdles and this time she finished 5th in her heat. Mahuk reached the final and finished 7th in the 400 metres hurdles at the 1998 Commonwealth Games.

Mahuk was the flag bearer for Vanuatu in the 2000 Summer Olympics opening ceremony.