Baiji is a species of dolphin, the Yangtze River dolphin (Lipotes vexillifer).
Baiji may also refer to:
Baiji, Iraq, a city Baiji District, Iraq Baiji Township, Xiuning County (), Anhui, China Baiji Township, Nanning (), in Yongning District, Nanning, Guangxi, China An ancient kingdom in the southern Korean peninsula, called Baekje in Korean
See also Bahjí Baijiu