Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Custer County, MT was 10695.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Custer County, MT reached a record high of 11117.00000 in January of 2015 and a record low of 10545.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Custer County, MT - last updated from the United States Federal Reserve on June of 2024.