This report builds on SDSN USA’s report, Never More Urgent, which explores the policy choices underlying racial inequality in the US. This index seeks to explore the following question: How far are states from achieving the SDGs, if their progress is measured by the experiences of those who have been least served by development progress? Results show that on average, white communities have outcomes approximately three times better than the least served racial community. Black and Indigenous communities are most often left behind in the US, although availability of data varies widely. The index adds to mounting evidence of a lack of consistently updated, racially disaggregated data in the US.