Resident Population in Millard County, UT was 13.43700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Millard County, UT reached a record high of 13.62600 in January of 1985 and a record low of 6.98800 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Millard County, UT - last updated from the United States Federal Reserve on May of 2024.