Elroy McKendree Avery, Ph.D., LL.D. (July 14, 1844 – December 1, 1935) was school principal, politician, author, and historian. Avery was an Ohio State Senator in the 1890s before becoming an early resident of west Pasco County, Florida and was the first mayor of New Port Richey, Florida. As an author, Avery wrote school textbooks about physics and chemistry as well as books about the history of the United States, Cleveland, and New Port Richey. He died there on December 1, 1935.