Gunnar Nielsen may refer to:
Gunnar Nielsen (actor) (1919–2009), Swedish film actor Gunnar Nielsen (athlete) (1928–1985), Danish athlete, former world record holder over 1500 metres Gunnar Nielsen (Argentine footballer) (born 1983), Argentine football midfielder Gunnar Nielsen (Faroese footballer) (born 1986), Faroese football goalkeeper
See also Gunnar Nilsson (disambiguation) Gunnar Nelson (disambiguation)