Allambie Heights is a suburb of Sydney in New South Wales, Australia. It covers an area of 6.71 square kilometres and is located 17.5 kilometres north-east of the Sydney central business district within the local government area of Northern Beaches Council. In the south, it is surrounded by the Manly Dam Reserve, which is the habitat for a wide range of species of flora and fauna. It falls within the Australian Eastern Daylight Time zone Australia/Sydney and has a recorded population of 7,009 residents.