John Neumann (disambiguation)

John Neumann (1811–1860) 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 (1903–1957), Hungarian-American mathematician
 * Johnny Neumann (1950–2019), American basketball player and coach
 * John Robert Neumann Jr. (1972–2017), perpetrator of the Orlando factory shooting in 2017