Beacon Hill is a suburb of northern Sydney, in the state of New South Wales, Australia 17 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, there were 7,457 people in Beacon Hill. 67.5% of people were born in Australia. The most common countries of birth were England 6.2%, China 3.3%, Italy 2.3% and New Zealand 2.3%. 76.5% of people only spoke English at home. Other languages spoken at home included Italian 3.6%, Mandarin 3.0% and Cantonese 1.5%. The most common responses for religious affiliation were Catholic 29.9%, No Religion 28.3% and Anglican 16.6%.

Beacon Hill is serviced by Keolis Downer Northern Beaches bus services. Warringah Road (A38) runs east/west through the suburb and provides access to Dee Why in the east and Roseville in the west.