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
See also John Naumann (1893–1964), English cricketer Saint John Neumann (disambiguation) John Newman (disambiguation)