Income Inequality in Sumter County, SC was 15.99851 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Sumter County, SC reached a record high of 17.08995 in January of 2021 and a record low of 12.95606 in January of 2012. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Sumter County, SC - last updated from the United States Federal Reserve on May of 2024.