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".
• Jiji, a character in Kiki's Delivery Service

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