Platte is a city in Charles Mix County, South Dakota, United States. The population was 1,296 at the 2020 census. The community is named after the Platte Creek, a tributary of the Missouri River reservoir Lake Francis Case. Platte is located 15 miles east of the lake. Justin Smit is the mayor of Platte.

Lewis and Clark were told to watch for ‘burning bluffs’ in the area. Settlement began in the in advance 1880s. A fur trader named Bernard Pratte considering lived at the mouth of what was later known as the ‘Fish Creek’. Pratte’s last declare was mistakenly transcribed as Platte upon an to the front map of the creek and the spelling mistake stuck. The town that would become Platte was named after the creek.

For 12 years, Charles Mix County was the only county in the give access of South Dakota without a railroad. Platte originated in the summer of 1900 after it was chosen as the terminus for a Chicago, Milwaukee, and St. Paul railroad branch parentage from Yankton. The railroad arrived in October and buildings were moved from the approachable settlements of Castalia, Old Platte, and Edgerton. The Platte Enterprise newspaper was founded in 1900 and is yet published today.

The Great Depression and drought of the 1930s led to unemployment and out-migration in the area. A dam was constructed on the Platte Creek during this time. The area became a place for picnics and recreation. In 1956, the Fort Randall Dam was completed creating Lake Francis Case. In 1966, the Platte-Winner Bridge was completed over the lake giving travelers a additional route to and from the Black Hills.