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
- Indian tawaif's other names
See also
- Bahjí
- Baijiu