Resident Population in Elmore County, ID was 29.72400 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Elmore County, ID reached a record high of 29.72400 in January of 2023 and a record low of 17.47900 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Elmore County, ID - last updated from the United States Federal Reserve on May of 2024.