Keith Mason (born 20 January 1982) is a former rugby league footballer who played in the 2000s and 2010s. He played as a prop for Wakefield Trinity Wildcats, St Helens (Heritage No. 1128), Castleford Tigers (Heritage No. 853) (two spells) and Huddersfield Giants, as well as Brisbane Norths, and for Melbourne Storm in the National Rugby League (NRL). Mason played in three Challenge Cup finals, winning one in 2004 for St Helens against Wigan in Cardiff. He also won the League Leaders' Shield with St Helens in 2005.