The Compagnie des chemins de fer de l'Est (, , CF de l'Est), often referred to simply as the Est company, was an early French railway company. The company was formed in 1853 by the merger of Compagnie du chemin de fer de Paris àStrasbourg, operating the Paris-Strasbourg line, and Compagnie du chemin de fer de Montereau àTroyes. In 1938 it became part of the majority state-owned Société Nationale des Chemins de fer Français (SNCF).
In 1854 the company absorbed the Compagnie du chemin de fer de Strasbourg àBâle, in 1858 the Compagnie du chemin de fer de Mulhouse àThann and in 1863 the railway network of the compagnie du chemin de fer des Ardennes.