Semih Deniz (born 5 January 1989) is a Turkish Paralympics medalist middle distance runner competing in the T11, T12 and T13 class.

[3] Deniz competed at the 2012 IPC Athletics European Championships held in Stadskanaal, Netherlands and won the silver medal in the 400m T12 event.

[3] The same year, he represented his country at the 2012 Paralympics in London, United Kingdom competing in the 400m T12, 800m T12, and 1500m T13 events.

[4] In 2013, he took the bronze medal in the 1500m T12 event at the 2013 IPC Athletics World Championships in Lyon, France.

[6] He won the bronze medal in the 1500m T11 event at the 2016 Paralympics in Rio de Janeiro, Brazil.