Hak or hak may refer to:
- Hak-e Olya, a village in Markazi Province, Iran
- Hak-e Sofla, a village in Markazi Province, Iran
- Armenian National Congress, the Armenian-language abbreviation of which is HAK
- Jim Fullington, American wrestler, ring name "Hak"
- Hakka Chinese (ISO 639-3 code "hak"), a spoken variation of the Chinese language
- Haikou Meilan International Airport (IATA code "HAK"), airport in China
- Minkend, Kurdish village in Azerbaijan
- Harold & Kumar, series of American comedy films
- Hrvatski autoklub, the national motoring organisation in Croatia