Little Platte River
General data
- Name: Little Platte River
- Water system: Missouri River
- Water type: River
- Progression: Platte River (Nebraska) -> Missouri River -> Mississippi River -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America
The Little Platte River is a river in the northwest Missouri, United States. It is a major tributary of Platte River and is 66.4 miles long, which makes it its second longest tributary. The river is the primary inflow for Smithville Lake and is its outflow before joining the Platte River. The stream is monitored at two locations, at Smithville. and just upstream from Plattsburg.