Perth marshalling yard (also known as Perth Yard) was a railway marshalling yard to the immediate west of Perth railway station in Perth, Western Australia and east of West Perth railway station. The origins and development of the yard can be seen in considerations of the 1899 Royal Commission into the early stages of city railway traffic and the related joint select committee on the bridges over William Street (the Horseshoe Bridge) and Melbourne Road (which did not eventuate). It can also be considered to be the railway land between the Horseshoe Bridge and the West Perth subway.