| Osman Nuri Koptagel 1311-b-P. 17[1] | |
| Birth Date: | 1874 |
| Birth Place: | Erzincan, Ottoman Empire |
| Death Place: | Ankara, Turkey |
| Placeofburial: | State Cemetery |
| Allegiance: |  Turkey |
| Serviceyears: | Ottoman Empire: 1900–1919 Turkey: 1919 – 8 May 1924 |
| Rank: | Major general |
| Commands: | Muş Training Center, 43rd Division, 27th Division, 43rd Division 12th Division, president of the martial court of Adapazarı, member of military courts of generals, president of the 1 no military court, 7th Division, member of the Military Supreme Court |
| Battles: | Balkan Wars First World War War of Independence |
| Laterwork: | Member of the GNAT (Malatya) |
Osman Nuri Koptagel (1874; Erzincan – 22 November 1942; Ankara) was an officer of the Ottoman Army and a general of the Turkish Army.
When he was an assistant teaching staff of the Ottoman Military Academy, he used to order "Sağdan birinci manga, kop ta gel!"[2] ("First squad from the right, separate (from line) and come!"), "Birinci mangadan sağdan itibaren beş kişi kop da gel!"[3] ("First squad of five person from the right, separate (from line) and come!"). His students gave him a nickname "Kop ta gel". After the 1934 Surname Law, Mustafa Kemal gave him a surname "Koptagel".
His granddaughter Yüksel Koptagel (born 27 October 1931) is a Turkish composer and pianist.