Double Bay is a harbourside eastern suburb of Sydney, in the state of New South Wales, Australia 4 kilometres east of the Sydney central business district. It is the administrative centre of the local government area of the Municipality of Woollahra.
Double Bay has the most expensive real-estate in Australia and takes its name from the bay of Sydney Harbour. It refers to the two geographical formations between Point Piper and Darling Point, which are interrupted by a miniature point in between. The eastern part is also known as Blackburn Cove. Colloquially it is often referred to as "Double Pay", a term coined in the 1980s, due to the high income of people living there, and the nature of the shopping area which features high-end fashion labels.