John Cohen may refer to:

Politicians

• John S. Cohen (1870–1935), U.S. Senator from Georgia
• John Cohen (Australian politician) (1859–1939), Australian politician and judge

Others

• John Cohen (baseball) (born 1966), American baseball coach
• John Cohen (musician) (1932–2019), American folk musician and photographer/filmmaker
• John Cohen (psychologist) (born 1911), British psychologist, see Thinker's Library
• J. M. Cohen (John Michael Cohen, 1903–1989), British writer and translator