Beadle County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 19,149, making it the 11th most populous county in South Dakota. Its county seat is Huron. The county was created in 1879 and organized in 1880. Beadle County comprises the Huron, SD Micropolitan Statistical Area.

Huron is a city in and the county seat of Beadle County, South Dakota, United States. The population was 14,263 at the 2020 census, and it is the 8th most populous city in South Dakota.