Platte is a city in Charles Mix County, South Dakota, United States. The population was 1,230 at the 2010 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.
Lewis and Clark were told to watch for ‘burning bluffs’ in the area. Settlement began in the early 1880s. A fur trader named Bernard Pratte once lived at the mouth of what was then known as the ‘Fish Creek’. Pratte's last name was mistakenly transcribed as Platte on an early map of the creek and the spelling error stuck. The town that would become Platte was named after the creek.
For 12 years, Charles Mix County was the only county in the state of South Dakota without a railroad. Platte originated in the summer of 1900 after it was selected as the terminus for a Chicago, Milwaukee, and St.