High School Graduate or Higher (5-year estimate) in Island County, WA was 95.70% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Island County, WA reached a record high of 95.70 in January of 2022 and a record low of 94.50 in January of 2015. Trading Economics provides the current actual value, an historical data chart and related indicators for High School Graduate or Higher (5-year estimate) in Island County, WA - last updated from the United States Federal Reserve on May of 2024.