The 2009 GP2 Series season was the forty-third season of the second-tier of Formula One feeder championship and also fifth season under the GP2 Series moniker. The season consisted of twenty races at ten rounds, beginning on 9 May at the Circuit de Catalunya and finishing on 20 September at the Autódromo Internacional do Algarve. The Algarve circuit hosted its first GP2 weekend, and was the only new circuit on the calendar. The Nürburgring also returned as part of its rotation with Hockenheim as the home of the German Grand Prix.

The Algarve International Circuit, commonly referred to as Portimão Circuit, is a 4.653 km (2.891 mi) race circuit located in Portimão, Algarve region, Portugal. The development includes a karting track, off-road track, technology park, five-star hotel, sports complex and apartments.