The Melbourne & Metropolitan Tramways Board (MMTB) was a government-owned authority that was responsible for the tram network in Melbourne, Australia between 1919 and 1983, when it was merged into the Metropolitan Transit Authority. It had been formed by the merger of a number of smaller tramway trusts and companies that operated throughout the city.

The Melbourne tramway network is a tramway system serving the city of Melbourne, Victoria, Australia. The tramway network is centred around the Melbourne central business district (CBD) and consists of approximately 1,700 tram stops across 24 routes. It is the largest operational urban tram network in the world and one of the most used, with more than 500 trams and 250 kilometres of double tram track. It served a patronage of 206 million over the year 2017-2018. Trams are the second most utilised form of public transport in Melbourne after the city's metropolitan commuter railway network.