Wellston is a city in Jackson County, Ohio, United States, in the southeastern part of the state. Founded in 1873 as an iron and coal producing center, the city was named after founder Harvey Wells, a member of the Ohio Constitutional Convention. The city was incorporated in 1876. The population was 5,663 at the 2010 census.
Wellston is a city in St. Louis County, Missouri, United States, along the northwest border of the city of St. Louis. The population was 2,313 at the 2010 census.