The Plaza Bridge in Ottawa, Ontario, Canada, is an automotive and pedestrian bridge that crosses the Rideau Canal just south of the Ottawa locks. It joins Wellington Street and Elgin Street in the Downtown core to the west with Rideau Street to the east. The Chateau Laurier abuts the bridge at the east end, while Parliament Hill is just beyond the west end. It is the northernmost bridge over the canal, just north of the Mackenzie King Bridge.
The bridge is constructed of three masonry spans. The western span is over a roadway along the western bank of the Canal. The central span is over the Canal. The eastern span is over a former railway tunnel running along the east bank of the Canal.