Avalon Beach is a northern beachside suburb of Sydney, in the state of New South Wales, Australia. It is 28 kilometres north of the Sydney central business district, in the local government area of Northern Beaches Council, in the Northern Beaches region. The area was previously called Avalon, with the name Avalon Beach being assigned during a change in boundaries and names in the Pittwater region in 2012.

According to the 2016 census of population, there were 9,905 residents in Avalon Beach. 73.3% of people were born in Australia. The next most common countries of birth were England 9.6%, New Zealand 2.0% and United States of America 1.1%. 90.2% of people only spoke English at home. The most common responses for religious affiliation were No Religion 43.0%, Catholic 19.4% and Anglican 18.6%.