Resident Population in Clay County, TN was 7.85700 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Clay County, TN reached a record high of 7.96400 in January of 2006 and a record low of 6.60000 in January of 1974. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Clay County, TN - last updated from the United States Federal Reserve on April of 2026.