Yu Xuanji (simplified Chinese: 鱼玄机, c840–c868), courtesy names Youwei (Chinese: 幼薇) and Huilan (simplified Chinese: 蕙兰), was a Chinese poet and courtesan of the late Tang dynasty, from Chang'an. She was one of the most famous women poets of Tang, along with Xue Tao, her fellow courtesan.

Yu Xuanji is distinctive for the quality of her poems, including many written in what seems to be a remarkably frank and direct autobiographical style; that is, using her own voice rather than speaking through a persona.