| Cheng Biguang | |
| Native Name: | 程璧光 |
| Office1: | Minister of Navy of the Republic of China |
| Term Start1: | 30 June 1916 |
| Term End1: | 24 June 1917 |
| Predecessor1: | Liu Guanxiong |
| Successor1: | Sa Zhenbing |
| Birth Date: | 1861 |
| Death Date: | 26 February 1918 (aged 56) |
| Birth Place: | Xiangshan County, Guangdong, |
| Death Place: | Haizhu District, Guangdong, Republic of China |
| Allegiance: | Republic of China |
| Branch: | Imperial Chinese Navy Republic of China Navy |
| Commands: | Admiral |
| Battles: | First Sino-Japanese War |
| Awards: | Order of Wen-Hu |
Cheng Biguang (Chinese: 程璧光) (1861－26 February 1918) was a Chinese admiral from the late Qing Dynasty and later the Republic of China.[1] He served in the Beiyang Fleet and the Republic of China Navy. When Duan Qirui refused to validate the Constitution, Cheng and fellow Admiral Lin Baoyi sailed their fleets down south to join with the 'Constitutional Government' of Sun Yat-sen.[2] He was assassinated in Haizhu District, Guangzhou, in 1918.