High School Graduate or Higher (5-year estimate) in Lewis County, ID was 89.90% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Lewis County, ID reached a record high of 90.20 in January of 2010 and a record low of 88.30 in January of 2013. Trading Economics provides the current actual value, an historical data chart and related indicators for High School Graduate or Higher (5-year estimate) in Lewis County, ID - last updated from the United States Federal Reserve on May of 2024.