Louis Moritz was a Northern Netherlandish painter .

Moritz was born in The Hague in 1773. Moritz was destined for a career in the military, but he chose a different direction himself. He was attracted to working as a painter.

His teacher was the Hague painter Dirk van der Aa . He also trained as a painter at the Royal Academy of Fine Arts of Brussels and the Royal Academy of Fine Arts of Ghent. Moritz painted genre, figure and horse scenes, as well as interiors, portraits and historical scenes. Moritz was also affiliated with the Amsterdamse Schouwburg where he managed the stage equipment and decorations. His contacts in the theater world offered him the opportunity to paint portraits actors and actresses.

Several of these portraits belong to the collections of the Stadsschouwburg Amsterdam and the Theater Instituut Nederland . He also painted portraits of various professors. Several of the portraits he painted are located in the Utrecht Academy Building and in the University Museum there.

Moritz was an honorary member of Arti et Amicitiae Amsterdam, of which he was one of the founders.

Moritz married the painter Annette Reijerman in Amsterdam in 1797 . He died in November 1850 at the age of 77 in his hometown of Amsterdam.