Hornstein is a surname. Notable people with the surname include:
Frank Hornstein (born 1959), American politicianHarvey A. Hornstein, PhD, author of Brutal Bosses and their Prey: How to Identify and Overcome Abuse in the Workplace (1996). (See Workplace bullying: Further reading)Norbert Hornstein, American linguistMarty Hornstein, American film producerMichal Hornstein (born 1920), Canadian businessman, art collector and philanthropistMichael Hornstein (born 1962), German jazz saxophonist