Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Gallatin County, MT was 525.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Gallatin County, MT reached a record high of 525.00000 in January of 2022 and a record low of 308.00000 in January of 2014. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Gallatin County, MT - last updated from the United States Federal Reserve on May of 2024.