THK

THK may refer to:

• Türk Hava Kurumu, the Turkish Aeronautical Association, builder of a number of glider and aircraft types:
  • THK-2
  • THK-4
  • THK-5
  • THK-7
  • THK-11
  • THK-15
  • THK-16
• Türk Hava Kuvvetleri, the Turkish Air Force