Morris S. Halliday (April 28, 1883 – May 17, 1943) was a lawyer and politician who represented the forty-first Senate District in the State of New York Senate from 1915 to 1918. He was also a noted football player at Cornell University during the early 20th century. In 1906, he served as the head coach at Hamilton College, compiling a record of 1–5–2. In later life, Halliday was involved in property management in Cleveland, Ohio.