Income Inequality in Mercer County, NJ was 21.43401 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Mercer County, NJ reached a record high of 21.43401 in January of 2022 and a record low of 16.46463 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Mercer County, NJ - last updated from the United States Federal Reserve on May of 2024.