High School Graduate or Higher (5-year estimate) in Costilla County, CO was 88.30% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Costilla County, CO reached a record high of 88.30 in January of 2022 and a record low of 73.90 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 Costilla County, CO - last updated from the United States Federal Reserve on May of 2024.