Estimate, Median Age by Sex, Total Population (5-year estimate) in Okmulgee County, OK was 39.30000 Years of Age in January of 2022, according to the United States Federal Reserve. Historically, Estimate, Median Age by Sex, Total Population (5-year estimate) in Okmulgee County, OK reached a record high of 39.30000 in January of 2014 and a record low of 37.20000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Estimate, Median Age by Sex, Total Population (5-year estimate) in Okmulgee County, OK - last updated from the United States Federal Reserve on May of 2024.