The 2020 season was the Castleford Tigers' 95th season in the Rugby Football League and their 13th consecutive season in the top flight of English rugby league. The club competed in the 2020 Super League and the 2020 Challenge Cup.
Red Cards
Yellow Cards
Gains
Losses
Castleford also agreed dual registration partnerships with the York City Knights in the RFL Championship and the Keighley Cougars in League 1.