Machias River

General data
- Name: Machias River
- Basin: Atlantic Ocean
- Water type: River
- Progression: Machias Bay -> Gulf of Maine -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Description
The Machias River is a 60-mile-long (96.6 km) river in Maine, USA. It flows through Washington County in the eastern part of the state, from Fifth Machias Lake, passing the town of Machias and emptying into Machias Bay.