Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Yellowstone County, MT was 139723.00000 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 Yellowstone County, MT reached a record high of 139723.00000 in January of 2022 and a record low of 122747.00000 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 Yellowstone County, MT - last updated from the United States Federal Reserve on May of 2024.