Nine Network (commonly known as Channel Nine or simply Nine) is an Australian commercial television network with headquarters based in Willoughby, a suburb located on the North Shore of Sydney. The Nine Network is one of five main free-to-air networks in Australia.

The Nine Network has been the second highest rating television network in Australia since 2007, behind the Seven Network and ahead of Network Ten, ABC and SBS. Nine had historically been the highest rating television network since television's inception in Australia in 1956 for most years up to 2006, although the Ten Network had dominated in 1985 and for a number of years in the 1970s. The Nine Network's was overtaken in the ratings in 2007 by its rival, the Seven Network, which has dominated ever since. As a result, Nine's slogan "Still the One" was discontinued. Since 2009, the network's slogan has been "Welcome Home". After a few years in the wilderness, with a period plagued by mass-sackings, programme cancellations and budget cuts, the Nine Network has enjoyed a period of stability and as of April 2012 Nine is well on it's way to regaining its previous position of the number one television network in Australia with an enormous network share thanks to The Voice Australia, The Block and The Celebrity Apprentice Australia.