Resident Population in Dawson County, MT was 8.81000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Dawson County, MT reached a record high of 12.41400 in January of 1982 and a record low of 8.56800 in January of 2008. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Dawson County, MT - last updated from the United States Federal Reserve on May of 2024.