The Nord-Sud ("North-South") Company (Société du Chemin de Fer Électrique Nord-Sud de Paris) was an operator of underground trains in Paris established in 1904, which built two lines (now line 12 and part of line 13) and had a concession to build a third. It was taken over by the Compagnie du chemin de fer métropolitain de Paris (CMP) in 1930 and incorporated into the Paris Métro.