Hillsong Church, commonly known as Hillsong, is a charismatic Christian megachurch and a Christian association of churches based in Australia. The original church was established in Baulkham Hills, New South Wales, as Hills Christian Life Centre by Brian Houston and his wife, Bobbie Houston, in 1983. Hillsong was a member of the Australian Christian Churches – the Australian branch of the US-based Assemblies of God – until 2018, when it separated to form a new denomination. The church is known for its contemporary worship music, with groups such as Hillsong Worship, Hillsong United and Hillsong Young & Free with many musical credits and hits and a series of scandals and criticisms.

A megachurch is a church with a very large membership that also offers a variety of educational and social activities. Most megachurches are Protestant, and particularly Evangelical, although the word denotes a type of organization, not a denomination. The Hartford Institute for Religion Research defines a megachurch as any Protestant Christian church that draws 2,000 or more people in a weekend.