Resident Population in Rich County, UT was 2.75200 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Rich County, UT reached a record high of 2.75200 in January of 2024 and a record low of 1.60000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Rich County, UT - last updated from the United States Federal Reserve on April of 2026.