Tien is a surname. Notable people with the surname include:
Chang-Lin Tien (1935–2002), the Chancellor of the University of California, Berkeley (1990–97)
James Tien (actor), a Chinese actor
James Tien (politician) (born 1947), a Hong Kong businessman and politician, current Chairman of the Liberal Party
Michael Tien, brother of James Tien (politician)
Tien Wei Wu, a Chinese Malaysian businessman (director)