South Dakota State in United States

South Dakota, the Mount Rushmore State, is known for its stunning prairies, Badlands, and rich Native American culture. The Black Hills region draws millions each year, while the state’s agricultural economy and small-town charm define its heartland appeal.

South Dakota uses a single area code 605, which has served the entire state since 1947. Even with growth in cities like Sioux Falls and Rapid City, area code 605 remains sufficient due to the state’s low population density. This simplicity makes South Dakota one of the few states still using just one area code statewide.