Li Shangyin (Chinese: 李商隱; pinyin: Lǐ Shāngyǐn, c. 813–858), courtesy name Yishan (Chinese: 義山), was a Chinese poet and politician of the late Tang dynasty. He is noted for his imagist and "no-title" (Chinese: 無題; pinyin: wútí) poetic style. Li has been frequently anthologized, and many of his poems have been translated into various languages, including several collections in English.

In the many published editions of the poetry anthology Three Hundred Tang Poems, the number of his poems ranks below only Du Fu, Li Bai, and Wang Wei.