Leen is a surname. Notable people with the surname include:
Bill Leen (born 1962), American musician Craig Leen (born 1975), American lawyer and former federal agency head Nina Leen (died 1995), Russian-American photographer Randy Leen (born 1975), American golfer Willem van Leen (1753–1825), Dutch painter Willie Joe Leen, Irish hurler James Leen, (1888-1949), Irish Bishop
See also Leen (given name) Lean (disambiguation)