Salomon Ehrmann (December 19, 1854 - October 24, 1926) was a Jewish-Austrian dermatologist and histologist born in the village of Ostrovec, today part of the Czech Republic. He was an important member of the so-called Vienna School of Dermatology, a group founded by Ferdinand von Hebra (1816–1888).
Ehrmann was a pupil of histopathologist Carl Wedl (1815–1891) at the University of Vienna. He later became director of the dermatological department at Vienna General Hospital. He specialized in the field of syphilology, and is remembered for his research involving the parasite "Spirochaetae pallida" (the causative agent of syphilis), and its spread throughout the human body.
In 1895 he described acne keloidalis, which he referred to as "folliculitis nuchae sclerotisans". Among his written works was a comparative diagnostic atlas of skin diseases called "Vergleichend-diagnostischer Atlas der Hautkrankheiten und der Syphilide". Other published works by Ehrmann include: