Moritz Christian Johann Reichsgraf von Fries (6 May 1777 – 26 December 1826) was an Austrian nobleman, banker and patron of the arts.

He was born in Vienna as the youngest son of Count Johann von Fries (1719–1785), one of the richest men in the Holy Roman Empire, thanks to many successful financial and industrial ventures and his wife Anna d’Escherny (1737–1807).

However, this was the height of von Fries' social and financial success, as the inflation and other economic troubles of the Napoleonic Wars coupled with the vast expenses of his standard of living progressively eroded his fortune.

A member of the Gesellschaft der Associierten Cavaliere, an association of noblemen that organised exclusive concerts with the leading musicians of the day, he also organised many private concerts and musical soirees, where he supported many musicians and composers, most notably Joseph Haydn, Ludwig van Beethoven and Franz Schubert.

However, von Fries was tricked into supplying these manuscripts to the publisher Artaria, who immediately brought out a 'pirated' edition without Beethoven's permission.