Karl Ludwig Prinz was an Austrian painter and set designer. He is known for large-scale landscapes from the Vienna Woods, the Alpine foothills and the Alps (South Tyrolean Dolomites).

Prince was self-taught. He lived in Germany from 1894 to 1898. From 1908 he was a member of the Vienna Fine Arts Cooperative. From 1912 he created sets for the court opera in Vienna and for theaters in Munich, Hamburg and New York. During the First World War he was accepted as a war painter in the Austro-Hungarian war press headquarters.

The Prinzgasse in the 22nd district of Vienna, Donaustadt, was named after Prinz in 1957.