Area code 605 serves the entire state of South Dakota, including cities such as Sioux Falls, Rapid City, Aberdeen, and Pierre, the state capital. As one of the original area codes assigned in 1947, 605 is deeply tied to the state’s identity. South Dakota’s economy is grounded in agriculture, banking, tourism, and healthcare. Sioux Falls is the largest city and a financial center that houses major employers such as Sanford Health and Wells Fargo. Rapid City serves as a gateway to the Black Hills and Mount Rushmore, contributing significantly to the state’s tourism industry. Despite its rural image, South Dakota boasts one of the fastest-growing populations in the Midwest, a business-friendly climate, and a high quality of life. A 605 number offers statewide recognition and is a strong choice for companies and individuals seeking credibility in the Great Plains.