Sydney Entertainment Centre (later known as Qantas Credit Union Arena) was a multi-purpose arena located in Haymarket, Sydney, Australia. It opened in May 1983, to replace Sydney Stadium, which had been demolished in 1970 to make way for the Eastern Suburbs railway line. The centre was owned by the Sydney Harbour Foreshore Authority, which administered the neighbouring Darling Harbour area, and managed under a lease.

It was one of Sydney's larger concert venues, licensed to accommodate over 13,000 people as a conventional theatre or 8,000 as a theatre-in-the-round. It was the largest permanent concert venue in Sydney until 1999, when the Sydney Super Dome opened at Sydney Olympic Park. The venue averaged attendances of 1 million people each year and hosted concerts, family shows, sporting events and corporate events. It was demolished in January 1‚ 2016.