The Program and System Information Protocol (PSIP) is the protocol used in the ATSC digital television system for carrying metadata about each channel in the broadcast MPEG transport stream of a TV station and for publishing information about television programs so that viewers can select what to watch by title and description.

PSIP defines virtual channels and content ratings, as well as electronic program guides with titles and (optionally) descriptions to be decoded and displayed by the ATSC tuner.

PSIP can also send:

PSIP is defined in ATSC standard A/65, the most recent revision of which is A/65C, published in 2006. A/69 is a recommended practice for implementing PSIP in a TV station.

PSIP also supersedes the A/55 and A/56 protocol methods of delivering program guide information (which the ATSC has deleted). TV Guide On Screen is a different, proprietary system provided by datacasting on a single station, while PSIP is required, at least in the United States, to be sent by every digital TV station.