Resident Population in Mason County, WV was 24.76500 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Mason County, WV reached a record high of 27.37700 in January of 2010 and a record low of 24.30600 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Mason County, WV - last updated from the United States Federal Reserve on May of 2024.