Siegfried Detlev Bendixen (25 November 1786, Kiel - 1864, London) was a German painter and graphic artist.
He received his first art lessons as an assistant to the fresco painter, . After further training in Kiel and Hamburg, he attended the Dresden Academy of Fine Arts (1809), followed by a year at the Academy of Fine Arts, Munich, where he studied history painting. Thanks to the financial support of Count, he was able to study in Paris, where he worked with Jacques-Louis David until 1812.
In 1813, he returned to Hamburg and settled there. On the recommendation of the jurist,, he worked as a teacher at the ". Later, he became a portrait artist; in oils as well as lithographs. In the mid-1820s, together with other local artists, he was part of a non-profit "academy" of the arts that offered two courses; one for young, beginning artists, and one for oil painting, that included working with nude models. His well-known students included Christian Morgenstern, Henri Lehmann, Louis Gurlitt, and .
During that same period, he came into possession of a large collection of paintings and drawings which he sold, over time, to support his other activities. In the late 1820s, he performed numerous commissions for religious art and church decorations.
In 1832, for reasons unknown, he moved to London. He continued to work as a portrait painter, but little is known of him after that point. A street in Hamburg's Barmbek district has been named after him. In 2019, his works were part of an exhibit, "Hamburger Schule – Das 19. Jahrhundert neu entdeckt", at the Hamburger Kunsthalle.