High School Graduate or Higher (5-year estimate) in Lincoln County, OK was 89.10% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Lincoln County, OK reached a record high of 89.10 in January of 2022 and a record low of 84.60 in January of 2014. Trading Economics provides the current actual value, an historical data chart and related indicators for High School Graduate or Higher (5-year estimate) in Lincoln County, OK - last updated from the United States Federal Reserve on May of 2024.