Halton Castle is in the former village of Halton which is now part of the town of Runcorn, Cheshire, England. The castle is situated on the top of Halton Hill, a sandstone prominence overlooking the village. It has been designated by English Heritage as a Grade I listed building, and a scheduled ancient monument.
It was the seat of the Barons of Halton from the 11th century until the 14th century and it then passed to the Duchy of Lancaster. It was besieged twice in the Civil War after which its structure deteriorated. In the 18th century a new courthouse was built on the site of the previous gatehouse. The castle lies in ruins apart from the courthouse which has been converted into a public house.