This clarinet arrangement of The First Noel is in the key of C (concert B flat). Select the image below for a printable PDF of the melody. The First Noel Band Play-Along page has more versions of this song, so you can play it with other woodwind and brass instruments. This page also features an extra version of the carol that is written entirely in the lower register, for clarinetists who are not comfortable playing in the upper register. The string arrangement of the carol is in the key of G. Visit the The First Noel lead sheet page which features the carol in seven different keys. On that page you can find an instrumental range that is comfortable for you, or print an arrangement that allows you to play along with string instruments.
The First Noel, written for clarinet in the lower register: