Castleford is a town in the City of Wakefield District, West Yorkshire, England. It had a population of 40,210 at the 2011 Census. Historically in the West Riding of Yorkshire, to the north of the town centre the River Calder joins the River Aire and the Aire and Calder Navigation. It is located north east of Wakefield, north of Pontefract and south east of Leeds. Castleford is the largest town in the Wakefield District after Wakefield itself.
The town is the site of a Roman settlement. Within the historical Castleford Borough are the suburbs of Airedale, Cutsyke, Ferry Fryston, Fryston Village, Glasshoughton, Half Acres, Hightown, Lock Lane, Townville, Wheldale and Whitwood.
Castleford is home to the rugby league Super League team Castleford Tigers.