High School Graduate or Higher (5-year estimate) in Gilliam County, OR was 89.80% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Gilliam County, OR reached a record high of 93.50 in January of 2020 and a record low of 84.80 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for High School Graduate or Higher (5-year estimate) in Gilliam County, OR - last updated from the United States Federal Reserve on May of 2024.