Jiji may refer to:
- The Jiji are an ethnic and linguistic group based in western Tanzania
Jiji Township in Nantou County, Taiwan is also written "Chichi"
- The 1999 Jiji earthquake had its epicenter in Jiji
- The Jiji Line is a railway line serving Jiji
- Jiji Press is a wire service in Japan
- Jiji is a word for " sister" in some Indo-Aryan languages. An alternative is "Didi".