Alexandr Vasilievich Kolobnev (Александр Васильевич Колобнев; born 4 May 1981) is a Russian former professional road bicycle racer. His major victories include winning the 2007 Monte Paschi Eroica, a stage of the 2007 Paris–Nice and he is a two-time winner of the Russian National Road Race Championships. In 2011, he was provisionally suspended after testing positive for a potential drug masking agent. He was cleared of intentional doping by the Court of Arbitration for Sport in February 2012, and returned to Team Katusha in March 2012.