Marcos Francisco Dueñas Jimeno (born April 9, 1978 in Granada) is a track and field athlete from Spain and is working as a physiotherapist. He has a disability: He is missing a part of a leg and is a T44 type athlete who took part at the 1996 Summer Paralympics and the 2000 Summer Paralympics. In the 4 x 400 meter race for T42-T46, he finished at 2nd position.