John Oskar Emanuel "Long-John" Nilsson (27 April 1908 – 1 December 1987) was a Swedish footballer who played as a forward.

He was the 1930–31 Allsvenskan top scorer while at GAIS and won two caps for the Sweden national team, scoring six goals.

Beginning his career at IK Virgo, he had his breakthrough year in 1930 with GAIS when he became the 1930–31 Allsvenskan top scorer and helped the club win the 1930–31 Swedish Championship.

[1] He briefly played for IFK Östersund in 1934 before signing with AIK, where he spent two Allsvenskan seasons.

[2] Nilsson made his debut for the Sweden national team on 17 July 1932, scoring two goals in a 3–4 loss to Austria at the Stockholm Olympic Stadium.