[1] He studied law, obtained his license and entered the bar of Saint-Jean-d'Angély, where he mainly dealt with financial matters.

He ran as government candidate for election to the Corps législatif as deputy for the fourth constituency of Charent-Inferieure to replace the viscount Anatole Lemercier(fr), who was running for reelection.

[2] Auguste Roy de Loulay was elected a representative for Charente-Inférieure on 8 February 1871, holding office until 7 March 1876.

[1] His fellow deputies for Charente, Eugène Eschassériaux and Alfred de Vast-Vimeux also sat with the Appel au peuple.

During his campaign Roy de Loulay and the former deputies Jean-Baptiste Boffinton and Alfred de Vast-Vimeux signed a circular in which they declared, "In the day of peril, on the 24th of May, we have placed Marshal MacMahon in power, that is to say that respecting the rights conferred on him by the Constitution we shall support with all our energy the government which has so clearly affirmed its desire to combat the spread of anti-social doctrines and revolutionary programs.

But when the time comes to revise the Constitution, as supporters of the appel au peuple (plebiscite), we will demand the right of the nation to pronounce directly on the form of its government.

He continued to serve in the General Council of Charente-Inférieure, which he had entered in 1848, until his sudden death on 21 February 1896 in Paris.