John Zimmerman may refer to:

• John Zimmerman (politician), mayor of Lancaster, Pennsylvania from 1856 to 1857
• John Zimmerman (figure skater) (born 1973), American professional pair skater
• John Zimmermann (historian) [de], German historian
• John C. Zimmerman Sr. (1835–1935), mayor of the City of Flint 1895–1896
• John G. Zimmerman (1927–2002), American magazine photographer
• John R. Zimmerman, meteorologist, see Zimmerman Island
• Long John Nebel, an influential New York City talk radio show host