Runcorn is an industrial town and cargo port within the borough of Halton in the ceremonial county of Cheshire, England. In 2009, its population was estimated to be 61,500. The town is on the southern bank of the River Mersey where the estuary narrows to form Runcorn Gap. Directly to the north across the Mersey is the town of Widnes. Upstream and 8 miles (12.9 km) to the northeast is the town of Warrington and downstream 16 miles (26 km) to the west is the city of Liverpool.