Jean-Louis Duport (October 4, 1749 ? September 7, 1819) was a cellist.
Together with his brother Jean-Pierre (1741?1818), also a cellist, he was student of Martin Berteau (1700?1771). He is perhaps best known today for his 21 etudes for solo cello that constitute the final part of the "Essai sur le doigté du violoncelle et sur la conduite de l'archet" ("Essay on the fingering of the violoncello and on the conduct of the bow") (1806), a seminal work of cello technique. Beethoven's two opus 5 cello sonatas were composed for him.
