Trex

Trex may refer to:


 * Tyrannosaurus rex, a large species of theropod dinosaur from the late Cretaceous Period
 * Trex Company, a composite decking manufacturer
 * TREX Regional Exchanges Oy (IXP), an Internet Exchange Point in Finland
 * Trex (card game) a card game
 * TREX search engine, a search engine in SAP NetWeaver
 * TREX (Tree Regular Expressions for XML), a subset of Regular Language description for XML
 * The proteins TREX1 and TREX2