Resident Population in Clay County, WV was 7.78300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Clay County, WV reached a record high of 11.30800 in January of 1981 and a record low of 7.78300 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Clay County, WV - last updated from the United States Federal Reserve on May of 2024.