Leetonia is a village in northern Columbiana County, Ohio, United States. The population was 1,833 at the 2020 census. It is about 15 miles south of Youngstown. The Village of Leetonia was founded in 1869, following the American Civil War. Leetonia was named for William Lee of Randolph, New York. Lee was one of the founders of the Leetonia Iron and Coa…Leetonia is a village in northern Columbiana County, Ohio, United States. The population was 1,833 at the 2020 census. It is about 15 miles south of Youngstown. The Village of Leetonia was founded in 1869, following the American Civil War. Leetonia was named for William Lee of Randolph, New York. Lee was one of the founders of the Leetonia Iron and Coal Company which was laid out in the village in 1866-1867.