Sophie Arnould (13 February 1740, Paris – 18 October 1802, Paris) was a French operatic soprano.
Born Magdeleine Sophie Arnould, she studied in Paris with Marie Fel and La Clairon, and made her stage debut at the Opéra de Paris on 15 December 1757 and sang there for 20 years.
She created for Christoph Wilibald Gluck the roles of Eurydice in Orphée et Eurydice and the title role in Iphigénie en Aulide. She also obtained considerable success in operas by Jean-Philippe Rameau, François Francoeur, and Pierre-Alexandre Monsigny.
According to her contemporaries, her voice was more beautiful than powerful, but she was a passionate actress. Her lack of discipline in both her professional and personal life led to a premature vocal decline, however she was able to retire in 1788 with an enviable pension of 2000 pounds (livres).
She was much in demand in Parisian society, and legend has it that Madame de Pompadour told her "With such talents, you could become a Princess". She was painted by Maurice Quentin de La Tour, and left her Souvenirs and an abundant correspondence.