SDW

SDW may refer to:
 * Sandwich railway station, station code
 * Seven dirty words
 * South Downs Way
 * Spin density wave
 * Static discharge wick, a device attached to the trailing edge of an aircraft's wing to deflect lightning
 * .sdw is a file extension used by StarOffice Writer
 * SDW (TV station), a digital television station in Western Australia, part of the West Digital Television network
 * Six-Day War
 * Swedich Drunken Wikings