IOF may refer to:Institute for the Oceans and Fisheries (IOF) at The University of British Columbia UBC Institute for the Oceans and Fisheries 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