Sidi-Hassan Chahdi (born 7 May 1989) is a French long-distance runner who competes mainly in cross country running competitions.
Born in Cluses, he has represented France four times at the IAAF World Cross Country Championships, twice as a junior and twice as a senior athlete (2011 and 2015).He has competed seven times consecutively at the European Cross Country Championships from 2007 to 2013.
During this period he was part of the gold medal-winning French teams 2007, 2008, 2009 and 2011, gathering honours at junior, under-23 and senior level in the process.
Individually, he was a junior bronze medallist in 2008, under-23 runner-up in 2009, under-23 champion in 2010, and then won his first senior medal (a silver) in 2012.