| Sin Gwang-su | |
| Hangul: | 신광수 |
| Hanja: | 申光洙 |
| Rr: | Sin Gwang-su |
| Mr: | Sin Kwang-su |
| Hangulja: | 성연 |
| Hanjaja: | 聖淵 |
| Rrja: | Seongyeon |
| Mrja: | Sŏngyŏn |
| Hangulho: | 석북 or 오악산인 |
| Hanjaho: | 石北 or 五嶽山人 |
| Rrho: | Seokbuk or Oaksanin |
| Mrho: | Sŏkpuk or Oaksanin |
Sin Gwang-su (; 1712–1775) was a poet of the late Joseon Dynasty. Living in the time of King Yeongjo, he was unable to attain a position of rank because his family was aligned with the Southerners faction. He married the daughter of Yun Duseo and became associated with Silhak. At 39, Sin finally passed the higher exam of the gwageo and was sent to Jeju as an official. He wrote a description of the island. His famed words from later life include the Gwan sang yung ma and Gwanseo akbu .