Katharine Bement Davis (January 15, 1860 – December 10, 1935) was an American progressive era social reformer and criminologist who became the first woman to head a major New York City agency when she was appointed Correction Commissioner on January 1, 1914. Davis was a former school teacher from upstate New York, who later became one of the nation's first female doctorates when she received her Ph.D. in economics from the University of Chicago in 1901. Davis was also known for her work as an American penologist and a writer who had a long-lasting effect on American penal reform in the late 19th and early 20th centuries.