Resident Population in Salt Lake County, UT was 1185.81300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Salt Lake County, UT reached a record high of 1186.92100 in January of 2020 and a record low of 458.60700 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Salt Lake County, UT - last updated from the United States Federal Reserve on May of 2024.