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-15
- THK-16
Türk Hava Kuvvetleri, the Turkish Air Force
Thye Hua Kwan Moral Society, a Singaporean voluntary welfare organization

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