Gaius Galerius was a Roman eques who was active during the reign of Tiberius. He is best known as the praefectus or governor of Egypt (16-32). Galerius came of a prominent family of Ariminum. He has been identified as the husband of the sister of Helvia, mother of Seneca the Younger. During his tenure, in the year 19 Germanicus visited the province in violation of the laws that no senator or eques could enter Egypt without explicit permission of the Emperor. Another event Galerius presided over was the periodic census for the province in 21/22; a surviving papyrus document attests that it was carried out.