Marked Tree is a city in Poinsett County, Arkansas, United States, along the St. Francis River, at the mouth of the Little River. The population …Marked Tree is a city in Poinsett County, Arkansas, United States, along the St. Francis River, at the mouth of the Little River. The population was 2,286 at the 2020 census. It is included in the Jonesboro, Arkansas, metropolitan statistical area.