| Hangul: | 이서우 |
| Hanja: | 李瑞雨 |
| Rr: | I Seou |
| Mr: | I Sŏu |
| Hangulja: | 윤보, 휴징 |
| Hanjaja: | 潤甫, 休徵 |
| Rrja: | Yunbo, Hyujing |
| Mrja: | Yunbo, Hyujing |
| Hangulho: | 송곡 |
| Hanjaho: | 松谷 |
| Rrho: | Songgok |
| Mrho: | Songgok |
Yi Seou (1 March 1633 – 14 October 1709), also spelled as Lee Seo-Woo, was a Korean scholar-official of the Joseon period. An early silhak writer, he was a member of the Southerners political faction.