Resident Population in Marshall County, WV was 29.40500 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Marshall County, WV reached a record high of 41.60800 in January of 1980 and a record low of 29.40500 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Marshall County, WV - last updated from the United States Federal Reserve on May of 2024.