Fort Thompson Mounds

Fort Thompson Mounds is an archaeological site in Buffalo County, South Dakota, near Fort Thompson and within the Crow Creek Reservation. It was declared a National Historic Landmark in 1964.

At the time of the designation in 1964, it was stated:

This large group of low burial mounds dating from Plains-Woodland times (c. 800) contains evidence of the first pottery-making peoples in area. It is situated on the Crow Creek Indian Reservation.