 In 2000, the largest denominational group was the Evangelical Protestants (with 10,229 adherents) and Mainline Protestants (with 3,593 adherents).The largest religious bodies were the Southern Baptist Convention (with 5,103 members) and the United Methodist Church (with 2,750 members).Educational attainment in Arkansas County is typical for a rural Arkansas county, with a 2016 study finding 82.5% of Arkansas County residents over age 25 held a high school degree or higher, below Arkansas and national averages of 85.2% and 87.0%, respectively.