Platte Township is a township in Buchanan County, Missouri, United States. At the 2020 census, its population was 514.
Platte Township was established in 1839, taking its name from the Platte River.
Platte Township covers an area of and contains no incorporated settlements. It contains six cemeteries: Allen, Frazier, Hebron, Number 6, Tobin, and Witts.
The streams of Belcher Branch, Castile Creek, Crabapple Branch, DeMoss Branch, Frazier Branch, Jenkins Branch, Malden Creek, and Wolfpen Creek run through this township.