 About 15.40% of families and 19.30% of the population were below the poverty line, including 27.90% of those under age 18 and 16.50% of those age 65 or over.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%.