Sevier County is a county located in the U.S. state of Arkansas. As of the 2020 census, the population was 15,839. The county seat is De Queen. Sevier County is Arkansas's 16th county, formed on October 17, 1828, and named for Ambrose Sevier, U.S. Senator from Arkansas. On November 3, 2020, voters in Sevier County, AR approved alcohol sales by a vote of 3,499 to 1,699.