Front of the Morgan Mansion, located on the northeastern corner of the junction of Broadway (State Routes 327/Ohio State Route 788/788) and Pennsylvania Avenue (State Route 63) in downtown Wellston, Ohio, United States. Built in 1905 and since converted into Wellston's city hall, it is listed on the National Register of Historic Places. – Nyttend, Public domain – Wikimedia Commons Wellston is located in Jackson County. About 5,412 people live here (as of 2020). Between 2010 and 2020, the population declined from 5,663 to 5,412. The region is at 226 meters above sea level. The area covers about 18.3 square kilometers. There are about 379 streets in Wellston. The postal codes are 45692. The dialing code is 740. Wellston is city in Jackson County, Ohio, United States of America. Among other things, Wellston has restaurants. More information at www.cityofwellston.org.