Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in McClain County, OK was 32682.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in McClain County, OK reached a record high of 32682.00000 in January of 2022 and a record low of 26569.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in McClain County, OK - last updated from the United States Federal Reserve on May of 2024.