Sir Adolphe-Basile Routhier FRSC (French pronunciation: [adɔlf bazil ʁutje]; May 8, 1839 – June 27, 1920) was a Canadian judge, author, and lyricist.

He wrote the lyrics of the original French version of the Canadian national anthem "O Canada".

He attended Séminaire de Ste-Thérèse, and later studied law at Université Laval.

[6] Routhier's poem "Ô Canada" was commissioned by the Lieutenant Governor of Quebec Théodore Robitaille for the 1880 Saint-Jean-Baptiste Day ceremony.

[7] In June 1914, Routhier was one of the three judges appointed to conduct the Commission of Inquiry into the sinking of the Canadian Pacific steamship Empress of Ireland, which had resulted in the loss of 1,012 lives.