Income Inequality in Pennington County, SD was 13.82887 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Pennington County, SD reached a record high of 13.82887 in January of 2022 and a record low of 11.57127 in January of 2015. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Pennington County, SD - last updated from the United States Federal Reserve on May of 2024.