Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Lewis and Clark County, MT was 380.00000 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 Lewis and Clark County, MT reached a record high of 380.00000 in January of 2022 and a record low of 175.00000 in January of 2018. 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 Lewis and Clark County, MT - last updated from the United States Federal Reserve on May of 2024.