IOR

The abbreviation IOR may refer to:


 * Importer of record, term in import and export
 * inclusive or - as opposed to XOR (exclusive OR)
 * Independent Order of Rechabites
 * Index of refraction
 * India Office Records
 * Indian Ocean Region
 * Indian Ocean Rim, e.g. as in Indian Ocean Rim Association
 * Inhibition of return, a phenomenon in visual perception
 * Interleaved or Random, a computer benchmark for I/O
 * International Offshore Rule, an early handicapping system for yacht racing
 * Interoperable Object Reference, a reference to a CORBA or RMI-IIOP object
 * Institute of Refrigeration, a UK scientific charity and membership organisation
 * Institute of Recruiters, a non-profit Institute for recruiters and HR professionals
 * Istituto per le Opere di Religione (Institute for Religious Works), the "Vatican Bank"
 * Interest on Reserves, a term used in macroeconomics having to do with reserves placed at the central bank
 * IORgroup Ltd (formerly Interiors of Richmond), a London-based commercial interior design company
 * I.O.R., optics company of Romania
 * IOR (formerly Inland Oil Refiners) is the company that owns and operates the Eromanga Refinery in outback Queensland, Australia
 * IOR, IATA airport code for Inishmore Aerodrome