Nkemdilim “Mary” Onyali-Omagbemi (born 3 February 1968) is a Nigerian former sprinter, she was a 5x Olympian 1988 - 2004. She had won the bronze medal in the 4 × 100 m relay at the 1992 Olympic Games and in the 200 m at the 1996 Olympic Games. She also won the 1994 Commonwealth Games 100 metres title. Mary Onyali-Omagbemi currently serves as the Special Adviser (Technical) to the Director General of the National Sports Commission in Nigeria.