Master Control is the technical hub of a broadcast operation common among most over-the-air television stations and cable channels. Radio operations also have a Master Control though it is generally not referred to as such.

Master Control is the final point before a signal is transmitted over-the-air or sent on to a cable television operator or satellite provider for broadcast. Television Master Control rooms include banks of television monitors, satellite receivers, videotape machines, transmission equipment, and, more recently, computer automation equipment for recording and playback of on-air programming.

Master Control is generally staffed with one or two operators around-the-clock, everyday to ensure continuous operation. Master Control operators are responsible for monitoring the quality and accuracy of the on-air product, ensuring the transmission meets federal regulations, troubleshooting equipment malfunctions, and preparing programming for future playback.

Many television and radio station groups have consolidated facilities and now operate multiple stations from one centralized, regional Master Control center. As an example of this centralized system on a large scale, NBC's "hub-spoke project" enables "hub" cities such as New York City, Los Angeles, and Miami to originate commercial breaks and programming for many of its individual stations, thus reducing or eliminating some responsibilities of the local Master Control.