Marcus Fulvius Flaccus was a consul in 264 BC. In the tradition of Livy his praenomen is "Quintus". In his consulship Fulvius Flaccus brought the reduction of Volsinii to an end and celebrated a triumph. He also conquered Velzna, an Etruscan city in central Italy, in 264 BC. It was the last Etruscan city to be taken by the Romans. He was considered to be the founder of the Flaccus branch of the gens Fulvius.