John Graas (March 14, 1917 – April 13, 1962) was an American jazz French horn player, composer, and arranger. Born in Dubuque, Iowa, Graas had a short but busy career on the West Coast, known primarily as one of the first and best French horn players in jazz.Graas had classical training, including attendance at the Tanglewood Music Center, where he performed under the tutelage of Serge Koussevitsky.