Guan Hanqing (simplified Chinese: 关汉卿, c. 1241–1320); sobriquet Yǐzhāi (已齋), Yīzhāi (一齋), Yǐzhāisǒu (已齋叟); was a Chinese dramatist, playwright, and poet during the Yuan Dynasty. He has been described as among the most prolific and highly regarded dramatists of the Yuan period.

He is credited with the writing of 68 plays, of which only 18 survive, three in fragments. These were written mostly in the vernacular of the time. In some cases, attribution is highly disputed. In addition to playwriting, Guan Hanqing is also said to be a master of songs (sanqu 散曲).