IOV
Iov or IOV may refer to:

 Independent Order of Vikings, an American organization that promotes Swedish culture and language
 Internet of vehicles, a network of connected transport devices and their monitoring systems
 In-Orbit Validation satellites, testbed satellites followed by four IOV Galileo satellites
 Interval of Validity, the range of values for x and y under which a differential equation is valid (see also Method of averaging and Integrating factor)
 Patriarch Job of Moscow (; 16th century1607), first Patriarch of Moscow and All Russia
 Istituto Oncologico Veneto (Venetian Oncology Institute), the public clinical research centre and hospital specialised on oncology in Veneto, Italy.