Jerauld County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 1,663. Its county seat is Wessington Springs. In 1873, the area occupied by the present Jerauld County was organized into Wetmore County. In 1881, Wetmore and its neighbor county to the south, Cragin County, were combined to form Aurora C…Jerauld County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 1,663. Its county seat is Wessington Springs. In 1873, the area occupied by the present Jerauld County was organized into Wetmore County. In 1881, Wetmore and its neighbor county to the south, Cragin County, were combined to form Aurora County. In 1883, the area of the former Wetmore County was reincorporated as present-day Jerauld County.