Time in South Dakota Time in South Dakota South Dakota lies in both the Mountain Time Zone and the Central Time Zone. Mountain Time roughly contains the western half of the state, but not all of it. Rapid City is the largest city in the Mountain Time portion of the state. Central Time contains the eastern half of the state and roughly more of the state than the Mountain Time Zone and includes the state capital Pierre and the largest city, Sioux Falls. The 2 zones for South Dakota as given by zone.tab of the IANA time zone database. Columns marked * are from
South Dakota State Penitentiary South Dakota State Penitentiary The South Dakota State Penitentiary is a state prison located in South Dakota's largest city, Sioux Falls, and holds the state's most deadly and dangerous criminals, as well as sex offenders. It was built in 1881. The building's industry shop makes several things for the state, including woodwork and license plates. The State Penitentiary also houses South Dakota's death row for men and the state's only execution chamber. The South Dakota State Penitentiary is located in northern Sioux Falls, occupying approximately thirty acres. First constructed as a territorial prison in 1881, it became the South Dakota