Crickhowell Bridge is an 18th-century bridge that spans the River Usk in Crickhowell, Powys, Wales. The main A4077 road to Gilwern crosses it. The bridge is claimed to be the longest stone bridge in Wales at over 128 metres (420 ft). It is a Grade I listed building and a Scheduled monument.

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; Grade I structures are those considered to be "buildings of exceptional interest". Listing was begun by a provision in the Town and Country Planning Act 1947. Once listed, strict limitations are imposed on the modifications allowed to a building's structure or fittings. In Wales, the authority for listing under the Planning Act 1990 rests with Cadw.