Gong Zutong (Chinese: 龚祖同; Wade–Giles: Kung Tsu-t'ung; 10 November 1904 – 26 June 1986) was a Chinese optical physicist. He was a founder of China's optical glass industry and served as Founding Director of the Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences (CAS). He was elected an academician of the CAS in 1980.