Dejen Gebremeskel (born 24 November 1989) is an Ethiopian long-distance runner who primarily competes in track events.
His personal best of 12:46.81 minutes for the 5000 metres ranks him as the fifth fastest of all time for the distance.
He was the 5000 m silver medallist at the 2012 London Olympics and took the bronze medal over that distance at the 2011 World Championships in Athletics.
He won his first track medals as a junior, coming second at the African Junior Athletics Championships, then taking the bronze medal at the 2008 World Junior Championships in Athletics.
He was a finalist at the IAAF World Indoor Championships in 2010 and 2012.