Konrad Gustav Süs was a German painter, illustrator and author of children's books.

After attending high school in Rinteln , Süs studied painting at the Kassel Art Academy and later at the Städelsches Institut in Frankfurt am Main with professors Johann David Passavant and Jakob Becker. He wrote children's fairy tales, which he illustrated himself. They were well received and some were translated into English and French. He is also known for his illustrations of the Swinegel-Hare story.

From 1848 to 1850 he painted portraits at home. From 1850 he lived in Düsseldorf, where he attended the art academy under Karl Ferdinand Sohn until 1851 and opened his own studio at Jägerhofstrasse No. 13 in 1854. In 1861 his son Wilhelm was born in Düsseldorf, who also became an artist. In the 1870s, Süs lived in the house of the factory owner Müller Schadowstraße 34 corner of Victoriastraße and moved into the house at Rosenstraße 28 around 1875, where he lived until the end of his life.

In his paintings, Süs mostly depicted animals, mainly poultry.

Among Süs' private students were the German genre and portrait painter Hedwig Greve, the painter Maria Süs (presumably his daughter), who married the pensioner Eduard Müller († before 1892) in 1881, and the Luxembourg portrait painter Thérèse Glaesener-Hartmann .