Thina may refer to:

• Thīna, a Buddhist term sometimes translated as "sloth"
• Thina River, a tributary of the Mzimvubu River of South Africa
• Thîna (Θῖνα), an ancient Greek name of China
• Thinae (Θῖναι) or Thina, an ancient Greek name for one of the capital cities of China
• Thina, the Malayalam name for foxtail millet

• Thina Thorleifsen (1885–1959), Norwegian politician
• Thina Chat, vocalist of the Greek band Dakrya

• Tina (disambiguation)
• Thena, a Marvel Comics character