Resident Population in Jackson County, MO was 718.56000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Jackson County, MO reached a record high of 718.56000 in January of 2023 and a record low of 627.96200 in January of 1983. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Jackson County, MO - last updated from the United States Federal Reserve on May of 2024.