Income Inequality in Custer County, SD was 13.00336 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Custer County, SD reached a record high of 13.51102 in January of 2019 and a record low of 10.95564 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Custer County, SD - last updated from the United States Federal Reserve on May of 2024.