Thomas Corneille (20 August 1625 – 8 December 1709) was a French dramatist.
Born in Rouen some nineteen years after his brother Pierre, the "great Corneille", Thomas's skill as a poet seems to have shown itself early. At the age of fifteen he composed a play in Latin which was performed by his fellow-pupils at the Jesuit school in Rouen, the Collège de Bourbon (now the Lycée Pierre Corneille). His first play in the French language, Les Engagements du hasard, was probably first performed at the Hôtel de Bourgogne in 1647, although not published until 1656.Le Feint Astrologue, imitated from the Spanish of Pedro Calderón de la Barca, and itself imitated in Dryden's An Evening's Love, came the following year.
After his brother's death, Thomas succeeded his vacant chair in the Académie française. He then turned his attention to philology, producing a new edition of the Remarques of CF Vaugelas in 1687, and in 1694 a dictionary of technical terms, intended to supplement that of the Academy. A complete translation of Ovid's Metamorphoses (he had published six books with the Heroic Epistles some years previously) followed in 1697.
In 1704 he lost his sight and was constituted a "veteran," a dignity which gave him the privileges of an academician, while exempting him from the duties. He did not allow his blindness to put a stop to his work, however, and in 1708 produced a large Dictionnaire universel géographique et historique in three volumes folio. This was his last major work. He died at Les Andelys at the age of eighty-four.