Resident Population in Greenbrier County, WV was 32.14900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Greenbrier County, WV reached a record high of 37.66500 in January of 1980 and a record low of 32.09000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Greenbrier County, WV - last updated from the United States Federal Reserve on May of 2024.