Louis-Jules Arnout was a French artist, painter, and lithographer active during the mid-19th century. His father, Jean-Baptiste Arnout, taught Jean-Louis the art of lithography as well as painting and other art forms. Arnout created works depicting landscapes and French, Swiss, Italian, and English cities. He displayed his work at the Paris Salon in 1852 and 1865. He died in Toulouse. He had one son, Auguste-Paul Arnout.