YW

YW may refer to:
 * Yw (digraph)
 * Air Nostrum (IATA code YW)
 * Yreka Western Railroad (reporting mark YW)
 * Y-Wing, a Star Wars starfighter
 * A US Navy hull classification symbol: Water barge, self propelled (YW)
 * Yottawatt, or 1024 watt