Ayad Lamdassem (born October 11, 1981 in Sidi Ifni) is a Moroccan-born long distance runner who competes for Spain internationally.
He has represented Spain twice in the 10,000 metres at the Summer Olympics (2008 and 2012) as well as the European Athletics Championships (2010, 2012).
Lamdassem has competed at the IAAF World Cross Country Championships on five occasions (once for Morocco and four times for Spain).
He was the silver medallist at the European Cross Country Championships in 2010 and 2011.
He was also a gold medallist at the 2010 Ibero-American Championships in Athletics.
His personal bests include 13:17.49 minutes for the 5000 metres, 27:45.58 min for the 10,000 m and 61:29 for the half marathon.