Resident Population in Powell County, MT was 7.13300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Powell County, MT reached a record high of 7.30000 in January of 1975 and a record low of 6.58200 in January of 1989. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Powell County, MT - last updated from the United States Federal Reserve on May of 2024.