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.

De Queen is a city and the county seat of Sevier County, Arkansas, United States. The population was 6,629 at the 2010 census. The placename is the anglicization of the family name of the Dutch merchant and railway financier, Jan de Goeijen (1861–1944). De Goeijen was reportedly rather unhappy with the deformation of his name.