Resident Population in Franklin County, KS was 26.12500 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Franklin County, KS reached a record high of 26.47500 in January of 2009 and a record low of 19.90000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Franklin County, KS - last updated from the United States Federal Reserve on May of 2024.