CAT4 or Cat 4 may refer to:
Cognitive Abilities Test (CAT4) used to predict student success by assessing verbal, non-verbal, mathematical, and spatial reasoning. Category 4 cable, network cabling that consists of four unshielded twisted-pair wires Qualicum Beach Airport (TC LID code), an airport in British Columbia, Canada Category 4 hurricane LTE User Equipment Category 4 in mobile communications standards