Gaius Laelius C.f. Sapiens (born c. 188 BC), was a Roman statesman, best known for his friendship with the Roman general and statesman Scipio Aemilianus (Scipio the Younger) (d. 129 BC). He was consul of 140 BC, elected with the help of his friend, by then censor, after failing to be elected in 141 BC. Gaius Laelius Sapiens was the son and heir of the Punic war general Gaius Laelius himself consul in 190 BC. This Laelius had been former second-in-command and long-time friend, since childhood, of the Roman general and statesman Scipio Africanus. The younger Laelius was apparently born around 188 BC, after his father had become consul but had failed to win command of the campaign against Antiochus III the Great of Syria which would have made him a rich man. His mother's name is unknown.
Laelius was a candidate for the consulship in 141 BC, but withdrew his candidacy thanks to the false promises of a novus homo, Quintus Pompeius (a distant relative of the future Pompey the Great), who promised to also step down but then returned to the field after Laelius had formally withdrawn. Pompeius thus became consul along with Gnaeus Servilius Caepio (of a family traditionally allied with the Cornelii Scipiones), and Scipio Aemilianus suffered a humiliating political reverse. Aemilianus got his friend elected consul in the following year (140 BC) along with Quintus Servilius Caepio, who was the third successive Servilii Caepione brother to become consul in as many years.
Laelius was called Sapiens ("wise") because of his decision not to undertake efforts at political reform that were beginning to create serious dissension in the Roman Senate. These efforts at reform had been initially proposed by Scipio Aemilianus but abandoned by him when the Senate failed to agree unanimously as he had demanded. Laelius was seen as wise because he avoided creating further dissension at the time; however, his unwillingness to stick his neck out led to a political schism within the Scipionic Circle. The reform program abandoned by Scipio and his circle of intimates, including Laelius, were later taken up by the brothers Publius Mucius Scaevola and Publius Licinius Crassus Dives Mucianus, and partially implemented by their relatives by marriage, the Brothers Gracchi. Despite this connection to radical reformers who were killed for their efforts, Laelius's own political significance is slight. Furthermore, Laelius prosecuted Tiberius Gracchus' supporters and opposed Gaius Papirius Carbo's plan to permit the reelection of tribunes.