Thai or THAI may refer to:

• Of or from Thailand, a country in Southeast Asia.
  • Thai people, Siamese people, Central/Southern Thai people or Thai noi people, an ethnic group from Central and Southern Thailand.
  • Tanintharyi Thai [th], Thai minority in southern Myanmar.
  • Yodaya people [th], Bamar with Thai ancestry in Central Myanmar.
  • Sukhothai language, a kind of Thai topolect, by the end of the 18th century, they gradually diverged into regional variants, which subsequently developed into the modern Central Thai and Southern Thai.
    • Central Thai language or Siamese language, the sole official language in Thailand and first language of most people in Central Thailand, including Thai Chinese in Southern Thailand.
    • Southern Thai language, or Southern Siamese language, or Tambralinga language, language of Southern Thailand first language of most people in Southern Thailand
    • Thai script
    • Thai (Unicode block)

• Thai (surname), a Vietnamese version of Cai, including a list of people with the name
• Thai Lee (born 1958), an American businesswoman
• Thai Nguyen, US-based Vietnamese fashion designer and television personality

• Thai (cannabis), a name for the drug
• Thai Airways International, the national airline of Thailand
• Thai cat, a breed of cat in Thailand
• Thai, a month in the Tamil calendar
  • Thai Pongal or simply Pongal, an agricultural festival in Tamil Nadu, India celebrated during the month
• Toe to Heel Air Injection (THAI), a method of extracting oil from oil sands
• Thái people (Vietnam), an ethnic group in Vietnam

• All pages with titles beginning with Thai
• Dai (disambiguation)
• Tai (disambiguation)
• Tay (disambiguation)
• Thais (disambiguation)
• Thay (disambiguation)
• Tie (disambiguation)
• Siam (disambiguation)
• Tai peoples or Thai peoples, the ethnic groups of southern China and Southeast Asia
• Thai tea or "cha-yen", a drink made from black tea