The Sunbury line is a railway line in Melbourne, Australia, that connects the suburb of Sunbury to the central business district. It is part of the Melbourne metropolitan rail network and serves several key stations along its route, providing essential transport for commuters and residents. The line was first opened in the 19th century and has undergone various upgrades over the years. It is operated by Metro Trains Melbourne, which manages the city's train services. The Sunbury line plays a crucial role in facilitating travel and reducing road congestion in the region.