Oneroa is a settlement on Waiheke Island in northern New Zealand.

The New Zealand Ministry for Culture and Heritage gives a translation of "long beach" for Oneroa.

[4][5] The statistical area of Oneroa West, which includes the suburb and areas west of it, covers 8.42 km2 (3.25 sq mi)[1] and had an estimated population of 1,350 as of June 2024,[2] with a population density of 160 people per km2.

The results were 89.1% European (Pākehā); 10.7% Māori; 2.2% Pasifika; 4.2% Asian; 4.9% Middle Eastern, Latin American and African New Zealanders (MELAA); and 1.8% other, which includes people giving their ethnicity as "New Zealander".

[7] Of those at least 15 years old, 456 (38.5%) people had a bachelor's or higher degree, 492 (41.5%) had a post-high school certificate or diploma, and 243 (20.5%) people exclusively held high school qualifications.