Castleford is the largest of the "five towns" district in the metropolitan borough of the City of Wakefield, in West Yorkshire, England. It is near Pontefract, and has a population of 37,713 as estimated in late 2010, To the north the River Calder joins the River Aire and the Aire and Calder Navigation canal. To the west and south is the M62 motorway. The town is home to the rugby league Super League team Castleford Tigers.
Historically a part of the West Riding of Yorkshire, Castleford and its surroundings have provided archaeological evidence of Roman activity.