Ông Io̍k-tek (王育德, Taiwanese: Ông Io̍k-tek; pinyin: Wáng Yùdé; Wade–Giles: Wang Yü-te; 30 January 1924–9 September 1985) was a Taiwanese scholar and early leader of the Taiwan independence movement. He is considered to be an authority on the Min Nan language family and the Taiwanese language. He resumed his studies in May 1950, and after completing his Ph.D. in 1969 at the University of Tokyo, he later taught Taiwanese at Meiji University in 1974.