Mathias Bau Hansen (born 3 July 1993) is a Danish professional ice hockey forward who is currently playing for Herning Blue Fox in the Metal Ligaen (DEN).

Bau Hansen made his Superisligaen debut playing with the Rødovre Mighty Bulls during the 2011–12 AL-Bank Ligaen season.

[1] After three successful seasons with the Frederikshavn White Hawks, Bau Hansen captured the attention of North America, agreeing to a one-year AHL contract with the Hershey Bears, affiliate to the Washington Capitals on 20 June 2017.

[3] After suffering a serious injury while participating with Denmark during the 2018 World Championships, Bau Hansen was initially ruled out of the beginning of the 2018–19 season, placed on the Capitals injured non-roster list.

On 16 July 2019, Bau Hansen returned to Europe in agreeing to a one-year contract with Austrian club, Dornbirn Bulldogs of the EBEL.