Benjamin Karpman (August 8, 1886 – May 24, 1962) was an American psychiatrist known for his work on human sexuality.

While at University of Minnesota Medical School, he worked with Jesse Francis McClendon on pioneering in situ pH measurements in the human digestive tract.

After completing his internship at St. Elizabeths Hospital, he rose to the position of Senior Medical Officer and Psychotherapist.

Karpman was a proponent of psychoanalysis and published many case reports based on his clinical experience.

[2] Karpman was a contributor to The American Mercury, where he was critical of the Harrison Narcotics Tax Act.