Alfred Sohn-Rethel (8 February 1875 – 10 December 1958) was a German Modernist painter of the Düsseldorf school of painting art movement.

He attended the Kunstakademie Düsseldorf (Düsseldorf Art Academy) in May 1888, and studied with artists Eduard von Gebhardt, Hugo Crola, Adolf Schill, and Johann Peter Theodor Janssen.

In 1893, Sohn-Rethel met his future spouse, Anna Julie Michels while staying at Lake Garda.

On 8 December 1897, his eldest child Anna Clara Marie Elisabeth "Lissi" Sohn-Rethel was born.

They held their first exhibition in May 1908 and brought German painting to the French Impressionists.