Silverwater Bridge, Concrete bridge in New South Wales, Australia

Silverwater Bridge is a concrete box girder bridge over the Parramatta River, linking Silverwater to Rydalmere and Ermington. It carries Silverwater Road, which was widened to six lanes between Parramatta Road and the bridge and extended across it to Victoria Road at Ermington.

The bridge opened in November 1962 as a milestone in Australian construction engineering. It was the first concrete box girder bridge built in New South Wales.

The name Silverwater has no known origin; one suggestion is that it refers to silver reflections of light off the nearby Parramatta River, and the bridge inherited the suburb's name. The bridge carries Silverwater Road, linking Silverwater to Rydalmere and Ermington.

Silverwater Road was widened to six lanes between Parramatta Road and the bridge when it was built, and the road continues across the span to Victoria Road at Ermington. Drivers heading between these points cross here rather than at the Gladesville or Ryde bridges downstream.

Silverwater Bridge was the first of two major bridges required for the Hornsby-Heathcote county road; the other was Alfords Point Bridge. It was only the second project on that road, after Olympic Drive in Lidcombe, built between Boorea and Church Streets in 1959.