Stax can refer to:

  • StAX, (Computer Programming) Streaming API for reading and writing XML in Java
  • Stax Earspeakers, a Japanese brand of electrostatic earspeakers
  • Stax Records, an American record company
  • STAf eXecution engine (STAX), a service available with Software Testing Automation Framework
  • Lay's Stax, a brand of potato snack chips sold by Lay's
  • Stax Inc., a management consulting firm