Income Inequality in Prairie County, MT was 20.33737 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Prairie County, MT reached a record high of 20.33737 in January of 2022 and a record low of 9.60375 in January of 2015. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Prairie County, MT - last updated from the United States Federal Reserve on June of 2024.