Estimate, Median Age by Sex, Total Population (5-year estimate) in Garfield County, OK was 35.70000 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 Garfield County, OK reached a record high of 37.60000 in January of 2010 and a record low of 35.70000 in January of 2017. 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 Garfield County, OK - last updated from the United States Federal Reserve on May of 2024.