Longuet (fl. c. 1839 - 1858), or Chez Longuet, was a French geographic publisher active in Paris in the mid-19th century. He took over the firm of Charles Simonneau (fl. c. 1803 - 1838) in 1839. Chez Longuet was, in turn, taken over by Lanée sometime around 1858. He published initially from 6 Rue de la Paix but later moved to 8 Rue de la Paix, Paris.