OTN

OTN may refer to:
 * OTN1, a Canadian television channel
 * Open Transport Network, a specific ring-based telecommunication network architecture
 * Optical transport network, a telecommunication network standards framework for optical networks
 * Oracle Technology Network, the official online/offline community for Oracle technical professionals
 * Ed-Air Airport – Oaktown, Indiana, United States (IATA code: OTN)