Mellunmäki (Swedish: Mellungsbacka) (Slang: Meltsi) has been a quarter of eastern Helsinki, Finland since 1946.

Serious construction of Mellunmäki began in 1950 and the area was originally designed for 7,000 residents.

Mellunmäki provides several essential services such as four grocery stores, three kiosks, four hairdressers, two physiotherapists, three restaurants, a 24/7 gym, and two nursing homes.

Many new homes are being built in the area, so the population is expected to increase significantly.

The closest notable neighbours are Kontula, Vesala, Länsimäki (a district of Vantaa), Vuosaari, and Vartioharju.