Percent of Population Below the Poverty Level (5-year estimate) in Grainger County, TN was 17.60% in January of 2022, according to the United States Federal Reserve. Historically, Percent of Population Below the Poverty Level (5-year estimate) in Grainger County, TN reached a record high of 21.20 in January of 2014 and a record low of 16.50 in January of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for Percent of Population Below the Poverty Level (5-year estimate) in Grainger County, TN - last updated from the United States Federal Reserve on May of 2024.