Gaius Antius Aulus Julius Quadratus (Ancient Greek: Γάϊος Ἄντιος Αὖλος Ἰούλιος Αὔλου υἱὸς Κουαδρᾶτος; fl. 1st and 2nd centuries) was a Roman senator from Pergamon, who was appointed consul twice, in AD 94 and then in AD 105, the first senator from the Eastern Mediterranean to achieve the ordinary consulship.