OzTAM is an Australian audience measurement research firm that collects and markets television ratings data.

It is jointly and equally owned by the Seven Network (Seven West Media), the Nine Network (Nine Entertainment) and Network 10 (Paramount ANZ), and is the official source of television ratings data for all metropolitan television in Sydney, Melbourne, Brisbane, Adelaide, and Perth, as well as subscription services (such as Foxtel) on a national basis.

OzTAM was created in 1999 after the Seven and Ten Networks led a call for a re-tendering of the contract to provide audience ratings.

Executives from both networks were concerned that the previous ratings service did not accurately reflect viewing levels for their channels.

[1] Prior to OzTAM, the dominant metropolitan ratings company was Nielsen Media Research.