Robert Ritter (14 May 1901 – 15 April 1951) was a German racial scientist doctor of psychology and medicine, with a background in child psychiatry and the biology of criminality.

"[1] His pseudo-scientific "research" in classifying these populations of Germany aided the Nazi government in their systematic persecution toward a goal of "racial purity".

In 1934, two years before being appointed as head of the German police's racial hygiene research unit, Ritter received his specialist certification in child psychology, studying the inheritability of criminality.

Ritter, heading this organization, had a team of other racial scientists including Eva Justin, Adolf Wurth, Sophie Ehrhardt, and Ruth Kellermann.

Despite the denazification of Germany after World War II, Ritter was not required to take responsibility for his actions towards the Roma and Sinti population during Nazi rule.

[2] Ritter was hired to teach criminal biology at the University of Tübingen from 1944 to 1946, and was later brought in by the Frankfurt Health Office as a pediatrician.