Income Inequality in Plymouth County, MA was 15.30495 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Plymouth County, MA reached a record high of 15.30495 in January of 2022 and a record low of 12.17678 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Plymouth County, MA - last updated from the United States Federal Reserve on May of 2024.