Maine River Map showing major rivers in Maine, River start and end point, county boundaries.
River Map of Maine State
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Rivers and Waterways in Maine
Maine鈥檚 river systems are shaped by forests, mountains, and a rugged coastline, with most rivers flowing southeast into the Atlantic Ocean. Northern and western regions feature fast-moving rivers fed by snowmelt and rainfall, while eastern areas have shorter coastal streams. Many rivers are connected to extensive lake systems that help regulate water flow. Maine鈥檚 waterways have long supported logging, hydropower, and recreation, and today they remain essential for ecosystems, fisheries, and local communities.
Major Rivers in Maine
| River | Length (Approx.) | Region | Flows Into |
|---|---|---|---|
| Penobscot River | 350 mi | Central | Atlantic Ocean |
| Kennebec River | 170 mi | Central | Atlantic Ocean |
| Androscoggin River | 178 mi | West | Kennebec River |
| St. John River | 418 mi | North | Bay of Fundy |
| Saco River | 136 mi | Southwest | Atlantic Ocean |
| Presumpscot River | 25 mi | South | Atlantic Ocean |
| St. Croix River | 110 mi | East | Bay of Fundy |
| Union River | 46 mi | East | Atlantic Ocean |
| Narraguagus River | 55 mi | East | Atlantic Ocean |
| Machias River | 80 mi | East | Atlantic Ocean |
| Piscataquis River | 65 mi | Central | Penobscot River |
| Allagash River | 92 mi | North | St. John River |
| Aroostook River | 112 mi | North | St. John River |
| Mattawamkeag River | 75 mi | North | Penobscot River |
| Sheepscot River | 66 mi | Central | Atlantic Ocean |
| Royal River | 39 mi | South | Atlantic Ocean |
| Ducktrap River | 30 mi | Central | Atlantic Ocean |
| Medomak River | 62 mi | Central | Atlantic Ocean |
Major Lakes in Maine
| Lake | Type | Region |
|---|---|---|
| Moosehead Lake | Natural lake | North |
| Sebago Lake | Natural lake | South |
| Rangeley Lake | Natural lake | West |
| Flagstaff Lake | Reservoir | West |
| Chesuncook Lake | Reservoir | North |
| Great Pond | Natural lake | Central |
| Long Lake | Natural lake | West |
| Aziscohos Lake | Reservoir | West |
| China Lake | Natural lake | Central |
| Webster Lake | Natural lake | Central |
Major River Basins in Maine
Maine鈥檚 river basins primarily drain into the Atlantic Ocean and the Bay of Fundy, with large watersheds supporting forests, fisheries, and hydropower. These basins are vital for maintaining water flow and ecological balance across the state.
- Penobscot River Basin
- Kennebec River Basin
- Androscoggin River Basin
- St. John River Basin
- Saco River Basin
- St. Croix River Basin
- Aroostook River Basin
- Allagash River Basin
- Machias River Basin
Maine Rivers Facts
| State | Maine |
| Total Rivers & Streams | 32,000+ miles of streams |
| Major Rivers | Penobscot, Kennebec, Androscoggin, St. John |
| Total Waterway Length | 35,000+ miles |
| Main Drainage | Atlantic Ocean & Bay of Fundy |
| Longest River | St. John River |
| Shortest River | Presumpscot River |
| Major River Basins | 9 Primary Basins |
| Primary Outlet | Atlantic Ocean |
| Key Uses | Hydropower, forestry, recreation, water supply |
| Longest River Within State | Penobscot River |
| Number of River Basins | 8鈥�10 Basins |
| Major Reservoirs | Flagstaff Lake, Chesuncook Lake, Aziscohos Lake |
| Primary Water Source | Surface water and lakes |
River Maps of the 50 U.S. States 鈥� Click on a State to View Its River Map
- Alabama River Map
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