Widnes is an industrial town in the Borough of Halton, Cheshire, England, on the north bank of the River Mersey where it narrows at Runcorn Gap. The town contains 21 buildings that are recorded in the National Heritage List for England as designated listed buildings. Of these, 5 are classified at Grade II*, and 16 at Grade II; Widnes has no Grade I listed buildings. In the United Kingdom, the term "listed building" refers to a building or other structure officially designated as being of special architectural, historical, or cultural significance. Listed buildings are categorised in three grades: Grade I consists of buildings of outstanding architectural or historical interest; Grade II* includes particularly significant buildings of more than local interest; Grade II consists of buildings of special architectural or historical interest.