AAJ or Aaj may refer to:

  • AAJ, IATA airport code for Cayana Airstrip in Suriname
  • Aaj Daily, an Urdu publication
  • Aaj, an Indian newspaper
  • AAJ TV, a television station in Pakistan
  • American Alpine Journal, a publication of the American Alpine Club
  • American Association for Justice, a U.S. legal organization (formerly Association of Trial Lawyers of America, ATLA)