White to Non-White Racial Dissimilarity (5-year estimate) Index for Stillwater County, MT was 26.15% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Stillwater County, MT reached a record high of 30.36 in January of 2015 and a record low of 2.78 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for White to Non-White Racial Dissimilarity (5-year estimate) Index for Stillwater County, MT - last updated from the United States Federal Reserve on May of 2024.