Yell County is a county in the U.S. state of Arkansas. As of the 2020 census, the population was 20,263. The county has two county seats, Dardanelle and Danville. Yell County is Arkansas's 42nd county, formed on December 5, 1840, from portions of Scott and Pope counties. It was named after Archibald Yell, who was the state's first member of the United States House of Representatives and the second governor of Arkansas. He died in combat at the Battle of Buena Vista during the Mexican–American War.

A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is in use in five countries: Canada, China, Hungary, Romania, and the United States. An equivalent term, shire town, is used in the U.S. state of Vermont and in several other English-speaking jurisdictions. County towns usually serve a similar function in Ireland, Jamaica, and the United Kingdom.