Income Inequality in Buffalo County, SD was 27.87597 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Buffalo County, SD reached a record high of 51.65464 in January of 2020 and a record low of 11.24918 in January of 2014. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Buffalo County, SD - last updated from the United States Federal Reserve on May of 2024.