Jean-François Delmas (14 April 1861 – 29 September 1933), or Francisque Delmas was a French bass-baritone who created roles in many French operas including Athanaël in Thaïs.

Delmas was born in Lyon and studied at the Paris Conservatoire winning first prizes for operatic singing. He made his debut in 1886 as Saint-Bris in Les Huguenots at the Paris Opéra. He remained with that company until 1927 and rarely sang outside France. He was known for the power and evenness of his voice with a sonorous quality in the bass range and an extended upper register, which allowed him to sing classic baritone roles such as Iago. Outside France he appeared at the Mariinsky in St Petersburg, the San Carlo in Lisbon, and the Monte Carlo Opera House in Monaco. His recordings for G&T, Pathé, Zonophone, Fonotipia, Odéon, and Opéra-Saphir are highly sought after by collectors.

He also created roles in Le Mage (Amrou), Messidor (Mathias), L'etranger (l'Etranger), Ariane (Périthoüs), Monna Vanna (Marco Colonna), Roma (Fabius), and sang in the Paris premiere of Fervaal (Arfagard).

Delmas died in Saint-Alban-de-Montbel (near Chambéry) at the age of 72, and is buried in the Cimetière Saint-Vincent de Montmartre with his wife, the soprano Blanche d'Ervilly (1853–1920).