A1 Grand Prix (A1GP) was a "single-make" open-wheel auto racing series that ran from 2005 until 2009. It was unique in its field in that competitors solely represented their nation as opposed to themselves or a team, the usual format in most formula racing series. As such, it was often promoted as the "World Cup of Motorsport". The series was ratified by the Fédération Internationale de l'Automobile (FIA), and races were held in the traditional Formula One off-season, the northern hemisphere winter. The nation-based A1GP concept was founded by Sheikh Maktoum Hasher Maktoum Al Maktoum of Dubai, initially in 2003. After a successful first season of A1GP, it was announced on 29 September 2006 that Maktoum was to sell his position as chairman and director of A1GP. The transfer of his share in the organisation of A1 Grand Prix to RAB Capital was finalized in December 2006. Tony Teixeira took control of the series in 2006, and the series later liquidated after failing to host any races during the 2009–10 season.

The 2005–06 A1 Grand Prix season was the inaugural season for the A1 Grand Prix series. It began on 25 September 2005, and finished on 2 April 2006 after eleven races.