John Nielsen

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
 * 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