Mathias Fredriksen (born 28 April 1994) is a Norwegian footballer who plays as a midfielder for the Tippeligaen side Mjøndalen.
He played youth football for Tollnes, but joined Odd's youth team after the 2009 season.
In mid-2012 he signed for the senior team.
Fredriksen made his senior league debut in a May 2013 0-1 loss against Start.