OW

OW, O.W. or ow may refer to:


 * Ow!, an interjection that denotes pain
 * ow (digraph), an English digraph
 * "Ow!" (composition), a Dizzy Gillespie bebop jazz composition
 * Obwalden, a canton of Switzerland
 * Organization Workshop, a method of adult education
 * Executive Airlines (IATA code OW)
 * Overwatch (video game)
 * Outer Wilds, a 2019 space exploration video game
 * Old Westminster, an alumna or alumnus of Westminster School