27 is an opera by composer Ricky Ian Gordon and librettist Royce Vavrek in a prologue and five acts that explores the relationship of Gertrude Stein and Alice B. Toklas, and the salons that they hosted at their residence at 27 rue de Fleurus in Paris. The work was commissioned by Opera Theatre of Saint Louis for mezzo-soprano Stephanie Blythe. The full cast of five singers was featured on the cover of the June 2014 issue of Opera News. The opera premiered on June 14, 2014, in a production directed by James Robinson and conducted by Michael Christie at the Loretto-Hilton Center in St. Louis, Missouri. The world premiere was recorded by Albany Records.

Ricky Ian Gordon is an American composer of art song, opera and musical theatre.