The 2015 GP2 Series season was the forty-ninth season of the second-tier of Formula One feeder championship and also eleventh season under the GP2 Series moniker, a championship for open-wheel racing cars run as a support series to the 2015 Formula One World Championship. Twenty-six drivers representing thirteen teams raced over eleven rounds, starting in Bahrain on 18 April and finishing in Abu Dhabi on 29 November.