Sydney is the state capital of New South Wales and the most populous city in Australia.

Sydney may also refer to:

• City of Sydney, inner city local government area of New South Wales
• Sydney central business district, which is officially the suburb of "Sydney, New South Wales"
• Electoral district of Sydney, electorate in state parliament of New South Wales
• Division of Sydney, electorate in federal parliament of Australia
• Sydney Island, Queensland

• Sydney, Nova Scotia
• North Sydney, Nova Scotia

• Sydney, Florida, unincorporated community

• Sydney (film), the original title of the 1996 Hard Eight (film)
• Sydney (TV series), a 1990 CBS TV series
• Sydney Film Festival, an annual competitive film festival held in Sydney, Australia
• Sydney Film School, a private film school based in Waterloo, a suburb of Sydney
• Sydney Filmmakers Co-operative, was a co-operative of independent filmmakers

• Blackburn Sydney, a British flying boat
• HMAS Sydney, several warships in the Royal Australian Navy
• Sydney (ship), an Australian cargo ship

• Sydney (name), including a list of people and characters with the name
• Robert Yates (politician) (1738–1801), American politician and presumed author with pseudonym "Sydney"

• Sydney Accord
• Sydney Declaration
• Sydney language
• University of Sydney
• Sydney FC, a professional soccer club
• "Sydney", a song by Puddle of Mudd from Life On Display
• "Sydney", a song by Caravan Palace from Panic
• Sydney, an early codename for Microsoft Copilot

• Sydney White, a 2007 film starring Amanda Bynes
• Sydney Cove, a small bay on the southern shore of Sydney Harbour
• Sydney Heads, that form the two-kilometre-wide entrance to Sydney Harbour
• Sydney Parade Avenue, Ireland
• Sydnee (disambiguation)
• Sidney (disambiguation)
• Sidnei
• Sid (disambiguation)
• Syd (disambiguation)