Resident Population in Sevier County, UT was 22.52000 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Sevier County, UT reached a record high of 22.52000 in January of 2024 and a record low of 10.10300 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Sevier County, UT - last updated from the United States Federal Reserve on April of 2026.