Gaius Dillius Vocula (died 70 AD) was a Roman commander of the Legio XXII Primigenia during the Batavian revolt. Defending Castra Vetera, he was murdered by rebellious Roman troops.^[1]

An inscription found at Rome, commissioned by his wife Helvia Procula, provides details of his cursus honorum.^[2] His first recorded office was a commission as a military tribune; although the inscription identifies the unit as "Legio I", there were two active c. 60 with that number: Legio I Germanica, and Legio I Minervia. Then came an appointment as a quattuorviri viarum curandarum, one of the four magistracies that comprised the vigintiviri; membership in one of these four was a preliminary and required first step toward a gaining entry into the Roman Senate. Next was the traditional Republican magistracy of quaestor, which he served in the public province of Bithynia and Pontus; upon completion of this magistracy Vocula would be enrolled in the Senate.^[3] Two more of the traditional magistracies followed: plebeian tribune and praetor; at some time afterwards he received his commission with the Twenty-second Legion.