Cohn is a common Jewish surname (related to the last name Cohen) and may refer to:
- Al Cohn
- Arthur Cohn, Swiss film producer
- Daniel Cohn-Bendit (Danny Cohn-Bendit)
- Dan Cohn-Sherbock
- Edwin J(oseph) Cohn **
- Ernst Max Cohn (1920–2004), philatelist from Alabama,
- Ferdinand (Julius) Cohn
- Gary Cohn (comics), American comic book writer
- Gustav Cohn
- Harry Cohn
- Harvey Cohn, Olympic athlete
- Joan Cohn (née Joan Perry), the widow of Harry Cohn
- Joseph Judson Cohn, MGM producer, founder of J.J. Cohn Estate
- Lawrence H. Cohn, cardiac surgeon and researcher
- Leopold Cohn (disambiguation)
- Linda Cohn
- Marc Cohn
- Marc Cohn (album)
- Mathilda Cohn
- Nik Cohn
- Norman Cohn
- Rebecca Cohn, American politician
- Rebecca Cohn Auditorium
- Ronald Cohn
- Roy Cohn
- Mindy Cohn
- Gretta Cohn
- Ruth Cohn, psychotherapist