The Nine network (slogan Still The One) is an Australian television network owned by Publishing and Broadcasting Limited (Kerry Packer's media company). Originally, it was known as the National Television Network and consisted of two stations, TCN-9 Sydney and GTV-9 Melbourne. It now broadcasts directly into Sydney, Melbourne, Adelaide, Perth, and Brisbane, and through affiliates (most of which carry virtually all of Nine's lineup of shows) into most of Australia's populated area. It is Australia's highest-rating television network.

The Adelaide and Perth stations are not owned by PBL - NWS-9 is owned by Southern Cross Broadcasting, and STW-9 is owned by Sunraysia Television. In New Zealand it has a 50% interest in Prime TV, which carry many of Nine's programs.

Nine carries programs primarily from Australia and the United States. Nine is the highest-spending network, with a stable of "star" hosts who are moved from program to program (including the innumerable "lifestyle" programs that have spread throughout the schedule in the 1990s) as well as prime example "Eddie Everywhere", Eddie McGuire, and often "warehoused" - paid large retainers to do nothing rather than go to another media outlet.

Its summer schedule is based around broadcasts of cricket, for which it has owned the local broadcast rights since World Series Cricket in the late 1970s. Its cricket broadcasts in that era revolutionised the way the sport was covered, featuring camera placed at both ends of the field (after Packer famously complained about seeing "cricketer's bums" every second over), instant replays, and other innovations.

The network also owns the rights to broadcast the National Rugby League national rugby league competition - the highest-profile winter sport in two states (New South Wales and Queensland) - and in 2002 acquired broadcast rights for Friday night and Sunday games in the Australian Football League, the elite Australian Rules Football competition, displacing the Seven Network which had held the rights for over 40 years. The deal assigned the rights for finals broadcasting to Network Ten, a deal which reportedly flabbergasted Packer.

The call signs for the Nine Network stations are:

• TCN-9 Sydney
• GTV-9 Melbourne
• QTQ-9 Brisbane
• STW-9 Perth
• NWS-9 Adelaide
• NTD-8 Darwin

Affiliate networks broadcasting near-exclusively Nine Network programming in the parts of Australia outside the five largest cities are:

• WIN Television - Southern New South Wales, Victoria, Queensland, Tasmania, South Australia, Australian Capital Territory
• NBN Television - Northern New South Wales (including the Gold Coast in Queensland)

All the above stations effectively make up the greater Nine Network.

Other affiliate networks that carry some Nine Network programming non-exclusively include:

• Imparja
• WIN Television - Western Australia