Resident Population in Jerome County, ID was 25.47900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Jerome County, ID reached a record high of 25.47900 in January of 2023 and a record low of 10.25300 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Jerome County, ID - last updated from the United States Federal Reserve on May of 2024.