Gnaeus Papirius Carbo (c. 130s BC – 82 BC) was a three-time consul of ancient Rome. A member of the Carbones of the plebeian gens Papiria, and nephew of Gaius Papirius Carbo (consul of 120), he was a strong supporter of the Marian party, and took part in the blockade of Rome (87 BC). In 85 BC he was chosen by Lucius Cornelius Cinna as his colleague in the consulship, and extensive preparations were made for carrying out war in Greece against Lucius Cornelius Sulla, who had announced his intention of returning to Italy. Cinna and Carbo declared themselves consuls for the following year, and large bodies of troops were transported across the Adriatic Sea; but when Cinna was murdered by his own soldiers, who refused to engage in civil war, Carbo was obliged to bring them back.