Trinity Peninsula () is the extreme northeast portion of the Antarctic Peninsula, extending northeastward for about 130 km (80 miles) from a line connecting Cape Kater and Cape Longing. Dating back more than a century, chartmakers used various names (Trinity, Palmer, Louis Philippe) for this portion of the Antarctic peninsula, each name having some historical merit. The recommended name derives from "Trinity Land" given by Edward Bransfield in January 1820, although the precise application by him has not been identified with certainty and is a matter of different interpretation by Antarctic historians. Named after the Trinity Board.
