Thomas Stewart Denison was an American playwright, novelist, publisher, and educator. In 1876 he founded the publishing company T. S. Denison & Company in Chicago. During his lifetime this company became one of the largest American publishers of theatrical works such as plays, vaudeville sketches, minstrel show materials, and poetry intended for public performance. Most of the material published by the company were not intended for professional use but were targeted towards amateur performance such as community theatre, school theatre groups, or church groups. After his death the company continued to operate in Chicago until 1943 when it moved to Minneapolis. The company's focus shifted away from theatre to education materials in the 20th century after Denison's death.