IOF

IOF may refer to:

• Fraunhofer IOF, the Fraunhofer Institute for Applied Optics and Precision Engineering
• Independent Order of Foresters
• Infraorbital foramen, an opening in the skull under the eye socket
• Institute of Forestry, a forestry-related technical institute under Tribhuvan University, Nepal's largest academic institution
• Institute of Frescography, an institute for fresco and mural art
• Chartered Institute of Fundraising
• International Orienteering Federation
• International Osteoporosis Foundation, a global alliance of organizations concerned with osteoporosis and metabolic bone disease
• Israel Occupation Forces or Israel Offensive Forces, unofficial alternative terms for the Israel Defence Forces.