| İzzettin Çalışlar 1319-Top. 13[1] | |
| Birth Place: | Yanya (Ioannina), Janina Vilayet, Ottoman Empire (modern Greece) |
| Death Place: | Istanbul, Turkey |
| Placeofburial: | Edirnekapı Şehitliği State Cemetery |
| Allegiance: |  Turkey |
| Serviceyears: | Ottoman: 1903–1920 Turkey: 1 July 1920 – 20 December 1939 |
| Rank: | General |
| Commands: | Chief of Staff of Edirne Kalesi Command, Chief of Staff of the 19th Division, Chief of Staff of the XVI Corps, Chief of Staff of the Anafartalar Group, Chief of Staff of the Second Army, 4th division of the General headquarters XX Corps (deputy), 23rd Division, 61st Division, 1st Group, I Corps, Military Governor of the Izmir Province, Third Army, Second Army |
| Battles: | Balkan Wars First World War War of Independence |
| Laterwork: | Member of the GNAT (Aydın) Member of the GNAT (Muğla) Member of the GNAT (Balıkesir) |
İzzettin Çalışlar (1882 in Yanya (Ioannina), Janina Vilayet – 20 August 1951 in Istanbul) was an officer of the Ottoman Army and a general of the Turkish Army. He is known for his achievements in the Gallipoli campaign of World War I. He later joined the forces of Mustafa Kemal and fought in the Turkish War of Independence. He also served as a politician and was a prominent member of the Kemalist movement.