Zeki Velidi Togan (Ahmet-Zaki Ahmetshakhovich Validov, sometimes spelled as Validi) (1890–1970 Istanbul) was a historian, Turkologist, and leader of the Bashkir revolutionary and liberation movement. 

He was born in Koedhoen village of Sterlitamak uyezd, today Bashkortostan. 
From 1912–1915 Velidi taught in the madrassa (school) in Kazan (Qasímiä), and from 1915 to 1917 he was a member of bureau, supporting Muslim deputies at the State Duma. In 1917 he was elected to Millät Mäclese, and with Şerif Manatov he organized the Bashkir Shura (Council). The Bashkir Congress at Orenburg in November–December 1917, of which Velidi was chairman, declaredBashkortostan's Independence. 
In 1918 and 1919 Velidi's Bashkir troops first fought under Ataman Alexander Dutov, then under Admiral Kolchak against Bolshevik forces. After the RSFSR promised autonomy to Bashkirs, Velidi switched allegiance, fighting with the Bolsheviks. 
From February 1919 to June 1920, he was chairman of the Bashrevkom (Bashkir Revolutionary Committee). He attended the Congress of the Peoples of the East held in Baku in September 1920, where he became involved in drawing up the statutes of ERK, a Muslim Socialist organisation. However, feeling the Bolsheviks had broken their promises, he became more critical of them when he moved toCentral Asia. 
In Turkistan, Velidi became a leader of the National Liberation Movement, referred to as the anti-Soviet Basmachi Movement by the Russians (Paksoy 1992). From 1920 to 1923 he was chairman of the "National Union of Turkistan". In 1923 Validi emigrated, after discovering original manuscripts of Ahmad ibn Fadlan in Iran. 
From 1925 Velidi lived in Turkey, becoming a teacher and professor at Istanbul University. He gained a doctor of philosophy in 1935 at the University of Vienna. Later he was a professor at Bonn University (1935–1937) and Göttingen University(1938–1939). In 1953 he became organizer of the İslam Tetkikleri Enstitüsü (Institute for Islamic Studies) at Istanbul University. In 1967, he was given an honorary doctorate from the University of Manchester. 
At the same time he contributed to the Encyclopedia of Turkic Peoples. His articles about culture, language and history of Turkic peoples have been translated into many languages.