O'Malley (/oʊmæli/) (postcode: 2606) is an affluent suburb of Canberra, Australian Capital Territory.

The suburb is named after King O'Malley, who was the politician who arranged the competition for a design for Canberra.

Streets in O'Malley are named with Aboriginal words.

[2] Wood fire heaters are banned in the newer East O'Malley area to due concerns of air quality in that valley[4] Deakin Volcanics green-grey and purple rhyodacite are under the suburb.

To the east in the valley bottom is Deakin Volcanics purple and green tuff and up the slopes of Mount Mugga Mugga are Deakin Volcanics coarse dark purple rhyodacite.