John Neumann (disambiguation)
John Neumann was a Bohemian-American bishop.
John Neumann may also refer to:
- St. John Neumann, Bryn Mawr, a Roman Catholic parish in the Archdiocese of Philadelphia
- John von Neumann, Hungarian-American mathematician
- Johnny Neumann, American basketball player and coach
- John Robert Neumann Jr., perpetrator of the Orlando factory shooting in 2017