Mellunmäki or Mellungsbacka is a ground-level bridge station on the northern branch (Itäkeskus - Mellunmäki) of the Helsinki Metro. It serves the district of Mellunmäki in East Helsinki, and is the terminus of the northern branch.
The station was opened on 1 September 1989, designed by the architect bureau Toivo Karhunen Oy. It is located 1.6 kilometres from the Kontula Metro Station. The terminus at the other end, Ruoholahti Metro Station, is 17 kilometres away. The Mellunmäki metro station is the northernmost metro station in the World.