Georges Hartmann was a French dramatist and opera librettist who wrote under the pen name Henri Grémont.

Since 1870 he was also a music publisher, publishing compositions of Jules Massenet. In May 1891 his publishing house failed and he was forced to sell it to Henri Heugel which, subsequently (through merger in 1980), became part of Alphonse Leduc publishing empire.

Hartmann's librettos include Massenet's Hérodiade (1881) and Werther (1892), Silver's Château Brillon (1892), André Messager's Madame Chrysanthème (1893) and Reynaldo Hahn's L'Île du rêve (1898).