August Ignatz Grosz was an Austrian genre and landscape painter and etcher.

Grosz first studied natural sciences at the University of Vienna, then from 1868 at the Academy of Fine Arts Vienna under Albert Zimmermann and Eduard Peithner von Lichtenfels, where he was also awarded the golden Füger medal.

He undertook study trips through Germany as well as to France, Italy and North Africa. After his return, he worked as a freelance artist in Vienna.

From 1872, he exhibited his works with motifs from Upper Bavaria, Rome and Venice at the Vienna Exhibition. From 1873 he was a member of the Vienna Künstlerhaus.