RTN

RTN may refer to:
 * Racetrack Television Network, North America
 * Random telegraph noise
 * Recursive transition network
 * Register transfer notation for synchronous digital circuits
 * Reticular thalamic nucleus
 * Retro Television Network, US
 * Routing Transit Number in US banking system
 * Rowan Television Network
 * Royal Thai Navy
 * Former callsign of the NRN TV station in Lismore, NSW, Australia
 * RTN (Switzerland), radio broadcaster