Simon Nielsen (born 1 October 1990)[1][2] is a former motorcycle speedway rider from Denmark.

[3] Born in Stenlille, Nielsen won 2005 Individual Speedway FIM Youth Gold Trophy 80 cc, unofficial U-16 World Championship.

In December 2011 he was announced as the final member of the 2012 Leicester Lions team in the British Premier League.

[5][6] After an injury early in the season, he showed good form before suffering a broken femur in a crash with team mate Jari Mäkinen on 23 June.

In 2014 he signed for Newcastle Diamonds, staying with the team for 2015[8] before moving on to Redcar Bears.