IJ may refer to:

• IJ (digraph), the ligature of the letters I and J
• IJ (bay), a body of water near Amsterdam, Netherlands
• Ij, Iran, a city in Fars Province, Iran
• IJmeer, a lake in the Netherlands
• immigration judge
• in genetics, the Y-DNA Haplogroup IJ
• Indiana Jones
• Infinite Jest
• Institute for Justice, a United States non-profit libertarian public interest law firm, specializing in pro bono support of individuals to engage in free enterprise without obtaining what it considers "unnecessary" licensing or regulatory compliance
• Internal jugular vein
• short form for Convent of the Holy Infant Jesus (CHIJ)
• iJustine
• IJ (motorcycle), popular motorcycle in Russia
• Great Wall Airlines IATA code
• İj River, a Tatar spelling for the Izh River

See also [link]

• IJK (disambiguation)

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