Peter Westenthaler (6. November 1967 in Wien; gebürtig Peter Hojač) ist ein österreichischer Politiker und langjähriger Spitzenrepräsentant der FPÖ, später des BZÖ. Westenthaler ließ seinen Familiennamen Hojač auf den Geburtsnamen der Mutter ändern.

Peter Westenthaler will not be top candidate for BZÖ. Westenthaler received a sentence of nine months on probation for perjury during his testimony at the trial of one of his bodyguards charged with assault last March. The bodyguard attacked a spokesman for former Justice Minister Karin Gastinger in a Vienna nightspot on the evening of the 1 October 2006, but Westenthaler, who witnessed the attack, said during his testimony that he had witnessed nothing.