Resident Population in Wheatland County, MT was 2.05700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Wheatland County, MT reached a record high of 2.52900 in January of 1970 and a record low of 1.97400 in January of 2006. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Wheatland County, MT - last updated from the United States Federal Reserve on May of 2024.