Decimus Laelius Balbus was a Roman senator and delator or informer, active during the Principate. He was suffect consul in the nundinium of July-August 46 as the colleague of Marcus Junius Silanus. His father has been identified as Decimus Laelius Balbus, consul in 6 BC. Balbus himself first enters history when in AD 37 he accused Acutia, the former wife of Publius Vitellius, of maiestas. Following her conviction, when the Senate voted on his reward, the plebeian tribune Junius Otho interposed with his veto. According to Tacitus, this gave rise to a feud between Vitellius and Otho which ended in Otho's banishment. That same year, Balbus was accused along with Albucilla, "notorious for the number of her lovers", was deprived of his rank as senator and exiled to an island, which was received