Perth Bridge (also known as Smeaton's Bridge, locally, the Old Bridge and in the local dialect of Scots, "the Auld Brig") is a toll-free bridge in the city of Perth, Scotland. It spans the River Tay, connecting Perth, on the eastern side of the river, to Bridgend, on its western side, carrying both automotive and pedestrian traffic of West Bridge Street (the A85). It is a Category A listed structure.