Gunpowder River
General data
- Name: Gunpowder River
- Water type: Estuary
- Progression:
- Climates: Temperate
- Continents: North America
- Countries: United States of America
The Gunpowder River is a 6.8-mile-long (10.9 km) tidal inlet on the western side of Chesapeake Bay in Maryland, United States. It is formed by the joining of two freshwater rivers, Gunpowder Falls (often referred to locally as "Big Gunpowder Falls") and Little Gunpowder Falls.