Martin Dematteis (born 24 May 1986) is an Italian male mountain runner and sky runner, one time senior individual European champion at European Mountain Running Championships (2016).

[1] He won a bronze medal in the sport of athletics at senior level with the national team at the 2009 European Cross Country Championships held in Dublin, Ireland.

[2] He won 8 medals at the World Mountain Running Championships (all with the national team) and 4 at individual level at the European Mountain Running Championships.

[3] He also competed at one edition of the IAAF World Cross Country Championships at senior level in 2010.

His twin brother Bernard Dematteis is also a mountain runner.