Mary Onyali-Omagbemi (née Onyali, an haife ta a 3 ga Fabrairun 1968) tsohuwar ƴar tseren Najeriya ce, ta kasance 5x Olympian 1988 - 2004. Ta ci lambar tagulla a raga 4 × 100 m a wasannin Olympics na 1992 da kuma a 200 m a 1996 Olympic Games. Ta kuma lashe gasar 1994 na Commonwealth Games mita 100. Onyali-Omagbemi ta yi rawar gani musamman a wasannin All-Africa, inda ya ci jimillar lambobin mutum 7 a gajerun tseren. Ta lashe mita 100 a 1991, 1995 da 2003 sannan ta dauki tagulla a 1987 . Lambobin zinare a cikin mita 200 an ɗauka a cikin 1987, 1995 da 2003. Bugu da ƙari kuma, ƙungiyarungiyar 'yan gudun hijirar ta 4 × 100 ta Najeriya ta lashe dukkan tsere tsakanin 1987 da 2003, a wasannin Afirka. An haifi Mary Onyali, a lokacin gasar Olympics ta 2000 an san ta da suna Mary Onyali-Omagbemi, bayan ta auri wani ɗan tseren Najeriya mai suna Victor Omagbemi. Fitowar ta a wasannin Olympics a jere daga 1988 zuwa 2004 ya sanya ta zama ƴar Najeriya ta farko da ta fara shiga gasar Olympics biyar Wannan wasan ya yi daidai da ƴan wasan kwallon tebur Bose Kaffo da Segun Toriola shekaru hudu bayan haka a Beijing, PR China .