Gaius Servilius Glaucia (d. 99 BC) was a Roman politician who served as tribune of the Plebs in 102 BC and praetor in 100 BC. He arranged for the murder of an elected tribune to clear the way for Lucius Appuleius Saturninus to gain election to the post. While attempting to stand for consul in 99 BC, he was engaged in an exchange between himself and a fellow senator who attempted to prevent his candidature on the grounds that he had not waited the mandatory two years between election as praetor and election to the consulship. In a fit of rage he killed the man and fled to the home of one his supporters, where he committed suicide.
