Resident Population in Caddo County, OK was 26.21400 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Caddo County, OK reached a record high of 34.59200 in January of 1983 and a record low of 26.19800 in January of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Caddo County, OK - last updated from the United States Federal Reserve on May of 2024.