There are 21 Monuments & Memorials in South Dakota, serving a population of 855,444 people in an area of 75,791 square miles. There is 1 Monument & Memorial per 40,735 people, and 1 Monument & Memorial per 3,609 square miles.
The state of South Dakota is ranked 6th in Monuments & Memorials per capita, and 43rd in Monuments & Memorials per square mile.