Tuan can refer to:

  • Tuan Do, the founder of technology blog, TechWalls
  • Brush-tailed phascogale, an Australian marsupial animal
  • Zaiyi, Prince Duan (or Prince Tuan), a Qing Dynasty prince and statesman
  • Duan Qirui (段祺瑞) (Wade-Giles Tuan Ch'i-jui), a powerful Chinese warlord in the early 20th century
  • Tuan mac Cairill, a figure in Irish mythology
  • an Irish music band formed by Brendan McFarlane
  • Mr./sir/lord in Malay or Indonesian language, as in the fictional "Jungle Jim" radio stories whereupon Jim's friend, Kolu addressed him as "Tuan Jim"