Premature Death Rate for Yellowstone County, MT was 555.70000 Rate per 100,000 in January of 2020, according to the United States Federal Reserve. Historically, Premature Death Rate for Yellowstone County, MT reached a record high of 555.70000 in January of 2020 and a record low of 350.50000 in January of 1999. Trading Economics provides the current actual value, an historical data chart and related indicators for Premature Death Rate for Yellowstone County, MT - last updated from the United States Federal Reserve on May of 2024.