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Educational attainment in Miller County is typical for a rural Arkansas county, with a 2016 study finding 85.5% of Miller County residents over age 25 held a high school degree or higher, in line with Arkansas and national averages of 85.2% and 87.0%, respectively. Miller County's proportion of population holding a bachelor's degree or higher is 14.5%, significantly below the state average of 21.5% and national average of 30.3%.