Rubai may refer to:
Li Rubai (1553–1620), a general of the Ming dynasty
Salim Rubai Ali (1935–1978), head of state of South Yemen
Rubai (album), an album by the Irish folk band Flook
Rubai (fictional character), a character in Indian films of the YRF Spy Universe, portrayed by Deepika Padukone and Grace Girdhar