Asselefech Medessa Mergia

Aselefech Mergia Medessa (Oromo: Asallafach Margaa Mardaasaa; Amharic: አሰለፈች መርጊያ; born 23 January 1985) is an Ethiopian long-distance runner who competes in the marathon.

She was a bronze medallist in the event at the 2009 World Championships in Athletics.

She is a two-time winner of the Dubai Marathon and has finished in the top three at the Paris and London Marathons. She was retrospectively confirmed as the winner of the 2010 London Marathon after the top two were disqualified. Her personal best of 2:19:31 hours is a former Ethiopian record for the distance and places her within the top ten of all-time.