Platte is a city in Charles Mix County, South Dakota, United States.

[5] 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 Lake Francis Case on the Missouri River.

[6] A fur trader named Bernard Pratte once lived at the mouth of what was then known as the ‘Fish Creek’.

[6] Pratte's last name was mistakenly transcribed as Platte on an early map of the creek and the spelling error stuck.

[8] Platte originated in the summer of 1900 after it was selected as the terminus for a Chicago, Milwaukee, and St. Paul railroad branch line from Yankton.

[8] The railroad arrived in October and buildings were moved from the nearby settlements of Castalia, Old Platte, and Edgerton.

[8] In 1966, the Platte-Winner Bridge was completed over the lake giving travelers a new route to and from the Black Hills.

[8] According to the United States Census Bureau, the city has a total area of 1.02 square miles (2.64 km2), all land.