John Dix Fisher (March 27, 1797 – March 3, 1850) was a physician and founder of Perkins Institution for the Blind in Boston, Massachusetts. He is credited with introducing the stethoscope into the United States and was an early advocate for the practice of mediate auscultation. He discovered what was called "cephalic bellows-sound" or "cerebral murmur", a phenomenon related to cerebral circulation which was thought to be a physical symptom of diseases of the brain. He was a founding member of the American Statistical Association.