IIM may refer to:
- Indian Institutes of Management, a group of business schools in India
- Alternative name for Mexican pop group Flans for 2002 revival, from initials of names Ivonne, Ilse and MimÃ
- IPTC Information Interchange Model, a standard for embedding metadata in images
- Indian Institute of Metals, Indian professional body
- Institute of Interim Management, UK professional body
- Instituto de Investigaciones en Materiales, Institute of Investigation in Materials, Mexican professional body
- Idiopathic Inflammatory Myopathy