As a member of the Royal Swedish Opera her roles have included Barbarina and Susanna in Le nozze di Figaro, Pamina in The Magic Flute (Mozart), Sandrina in La finta giardiniera, Dorinda in Orlando (Handel), Tebaldo in Don Carlos (Verdi), Frasquita in Carmen (Bizet), Gabrielle in La Vie parisienne (Offenbach), Gretel in Hansel und Gretel (Humperdinck) and Sophie in Der Rosenkavalier (Richard Strauss).

[2] In addition to these roles, at other opera houses Miah Persson has sung Brigida in Cimarosa's Gli sposi per accidenti (Studio Lirico, Cortina, Italy), Hero in Berlioz's Béatrice et Bénédict (Théâtre des Champs-Elysées, Paris and Baden-Baden), Costanza in Scarlatti's La Griselda (Staatsoper, Berlin), Nannetta in Verdi’s Falstaff (Aix-en-Provence), and Governess in Britten's The Turn of the Screw (Frankfurt).

Her Royal Opera House Covent Garden debut was in 2006 (Susanna) and the same year at Glyndebourne Festival sang Fiordiligi in Così fan tutte.

She created the role of the woman in Blank Out by Michel van der Aa at the Muziekgebouw in Amsterdam in March 2016, alongside Roderick Williams.

[4] In 2018 Persson sang her first Countess Madeleine in Capriccio at Garsington, and followed this in June 2021 with her first Marschallin in Rosenkavalier, one critic commending her "moments of self-reflection" and "burnished quality of old gold in the lyrical passages, with plenty of stamina for the taxing high lines of the Act 3 trio" and felt that "she recalls the great Viennese Marschallins of the 1950s, most of them, like her, graduates from Sophie.