High School Graduate or Higher (5-year estimate) in Harper County, OK was 90.20% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Harper County, OK reached a record high of 90.20 in January of 2022 and a record low of 80.90 in January of 2017. Trading Economics provides the current actual value, an historical data chart and related indicators for High School Graduate or Higher (5-year estimate) in Harper County, OK - last updated from the United States Federal Reserve on May of 2024.