John Nielsen may refer to:
John Nielsen (footballer, born 1911) John Nielsen (footballer, born 1946), Danish player John Nielsen (footballer, born 1972), Danish player John Nielsen (racing driver) (born 1956), Danish auto racer Johnny Nielsen (born 1941), Danish wrestler John M. Nielson (born 1943), American minister in the Church of the Nazarene John Nielsen (born 1961), American nature writer and NPR science reporter, see National Outdoor Book Award
See also John Neilson (disambiguation) Jack Nielsen (disambiguation) John Nielsen-Gammon (born 1962), American meteorologist, climatologist and academic Timothy John Nielsen (born 1968), English-born Australian first-class cricketer Nielsen (disambiguation)