Resident Population in Madison County, ID was 54.54700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Madison County, ID reached a record high of 54.97600 in January of 2022 and a record low of 13.45200 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Madison County, ID - last updated from the United States Federal Reserve on May of 2024.