Resident Population in Jefferson County, WV was 61.26400 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Jefferson County, WV reached a record high of 61.26400 in January of 2024 and a record low of 21.28000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Jefferson County, WV - last updated from the United States Federal Reserve on April of 2026.