WDD (disambiguation)

WDD or Wdd may refer to:
 * World Diabetes Day, the global awareness campaign
 * When Dream and Day Unite, the debut studio album by Dream Theater
 * wdd, the ISO 639-3 code for Wanzi language
 * Walter Donald Douglas, an American business executive
 * Woodside station (LIRR), the station code WDD
 * Widdrington railway station, the station code WDD
 * Weakly diagonally dominant
 * Western Development Division