Resident Population in Unicoi County, TN was 17.75600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Unicoi County, TN reached a record high of 18.30300 in January of 2011 and a record low of 15.25400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Unicoi County, TN - last updated from the United States Federal Reserve on May of 2024.