LIJ, Lij or lij may refer to:
- An Ethiopian aristocratic and court title that is given to the young member of the reigning royal house demonstrating positive traits in the imperial administration.
- Lij, Iran, a village in Isfahan Province, Iran
- Lij, West Azerbaijan, a village in West Azerbaijan Province, Iran
- Ligurian (Romance language) (ISO 639-3 code)
- North Shore-LIJ Health System
- Lego Indiana Jones
- Los Ingobernables de Japón