Lucius Cornelius Cinna (flourished 1st century BC) was the son of the consul Lucius Cornelius Cinna, who was a supporter of politician Gaius Marius. His sister, Cornelia Cinna minor, was the first wife of dictator Julius Caesar and he was the maternal uncle of their daughter Julia Caesaris. Cinna was a member of the gens Cornelia, who were of patrician status.