The gens Sempronia was a Roman family of great antiquity. It included both patrician and plebeian branches. The first of the Sempronii to obtain the consulship was Aulus Sempronius Atratinus, in 497 B.C., the twelfth year of the Republic. The patrician Sempronii frequently obtained the highest offices of the state in the early centuries of the Republic, but they were eclipsed by the plebeian families of the gens at the end of the fourth century B.C. The glory of the Sempronia gens is confined to the Republican period. Very few persons of this name, and none of them of any importance, are mentioned under the Empire.