Resident Population in Johnson County, AR was 26.12900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Johnson County, AR reached a record high of 26.68400 in January of 2018 and a record low of 13.63000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Johnson County, AR - last updated from the United States Federal Reserve on June of 2024.