Julián Alarcón (28 January 1888 – 19 August 1957) was a Paraguayan composer and violinist.

Beginning in 1909, Alarcón studied guitar and violin at the Paraguayan Gymnasium.

He formed the “Guaraní Trio,” along with members Carlos S. Caballero and Manuel Moreno.

In 1942, he won the Paraguayan Atheneum's Compositioning prize with his song “Abandonada” ("Abandoned", in English).

His more popular songs include: “Serenata clásica”, “Nanawa” (a patriotic polka), “3 de mayo” (a folkloric anthem of Paraguay), “Nde resa kuarahy’ame” (A love song with lyrics from Teodoro S. Mongelós), “Recuerdos del Paraguay”, “Sábado ka’aru”, “Alegre amanecer”, “Ha Paraguay”, “Zorzal del Paraguay”, “Tesa yvoty”, “Serenata”, “Marave ndoikói” and “Loma Clavel”.