Resident Population in Monongalia County, WV was 107.71800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Monongalia County, WV reached a record high of 107.71800 in January of 2023 and a record low of 63.71400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Monongalia County, WV - last updated from the United States Federal Reserve on May of 2024.