Allambie Heights is a suburb of Northern Sydney, in the state of New South Wales, Australia 17.5 kilometres north-east of the Sydney central business district in the local government area of Northern Beaches Council. It is part of the Northern Beaches region.

According to the 2016 census of Population, there were 7,009 residents in Allambie Heights. 71.0% of people were born in Australia. The most common countries of birth were England 7.6%, New Zealand 2.1%, China 1.8% and Italy 1.6%. 83.9% of people only spoke English at home. Other languages spoken at home included Mandarin 1.8% and Italian 1.6%. The most common responses for religious affiliation were No Religion 33.7%, Catholic 28.1%, and Anglican 18.1%.