The rail network of Melbourne, Australia, has a significant number of railway lines and yards serving freight traffic. Rail transport in Victoria is heavily focused on Melbourne, and, as a consequence, much of the state's rail freight passes through the metropolitan network.
The lines are of two gauges: 1,600 mm (5 ft 3 in) Victorian broad gauge and 1,435 mm (4 ft 8+1⁄2 in) standard gauge. Because the standard gauge lines were developed to facilitate interstate freight decades after the establishment of the original broad gauge network, they are used almost exclusively by freight services; while some broad gauge lines are used exclusively for freight, but many are shared with the suburban and regional passenger networks operated by Metro Trains Melbourne and V/Line respectively.
Although a limited number of electric freight services historically operated in the metropolitan area, a lack of electrical infrastructure on Victorian mainlines means that no freight services in Melbourne now use electric traction, despite some services operating over the electrified passenger network.
Fixed infrastructure, such as track, signals and yards, is largely owned, operated and maintained by government agencies or in the metro area a franchisee to the government. However, all freight services are run by private operators, and some sidings and intermodal facilities are under their control.