Mellons Bay is located on the eastern edges of metropolitan East Auckland along the Hauraki Gulf coast.

[3] and consists of two ridges joined by a wide steep gully facing east.

[4] The bay itself is located to the east of the suburb, and looks out towards the Tāmaki Strait and Waiheke Island.

[5] The traditional Ngāi Tai ki Tāmaki name for Mellons Bay was Okokino, referring to the bad gusts of winds that were hazards for waka travelling along the coast.

The results were 65.6% European (Pākehā); 4.2% Māori; 1.4% Pasifika; 33.3% Asian; 1.9% Middle Eastern, Latin American and African New Zealanders (MELAA); and 2.0% other, which includes people giving their ethnicity as "New Zealander".

[9] Religious affiliations were 33.5% Christian, 1.6% Hindu, 1.1% Islam, 2.0% Buddhist, 0.4% New Age, 0.1% Jewish, and 1.6% other religions.