Maryland River Map showing major rivers in Maryland, start and end point, county boundaries.
River Map of Maryland State
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Rivers and Waterways in Maryland
Maryland’s river systems are shaped by its varied geography, from the Appalachian Mountains in the west to the Chesapeake Bay and Atlantic coastline in the east. Most rivers drain into the Chesapeake Bay, which dominates the state’s water network, while western rivers connect to the Ohio River and Mississippi system. Tidal rivers and estuaries are common in central and eastern regions. Maryland also has several reservoirs and natural lakes that support water supply, recreation, and environmental conservation.
Major Rivers in Maryland
| River | Length (Approx.) | Region | Flows Into |
|---|---|---|---|
| Potomac River | 405 mi | West | Chesapeake Bay |
| Susquehanna River | 444 mi | North | Chesapeake Bay |
| Patuxent River | 115 mi | Central | Chesapeake Bay |
| Patapsco River | 39 mi | Central | Chesapeake Bay |
| Choptank River | 71 mi | East | Chesapeake Bay |
| Nanticoke River | 64 mi | East | Chesapeake Bay |
| Pocomoke River | 66 mi | East | Chesapeake Bay |
| Monocacy River | 58 mi | Central | Potomac River |
| Gunpowder River | 50 mi | Central | Chesapeake Bay |
| Severn River | 14 mi | Central | Chesapeake Bay |
| Magothy River | 14 mi | Central | Chesapeake Bay |
| South River | 14 mi | Central | Chesapeake Bay |
| North East River | 16 mi | North | Chesapeake Bay |
| Elk River | 15 mi | North | Chesapeake Bay |
| Youghiogheny River | 134 mi | West | Monongahela River |
| Casselman River | 56 mi | West | Youghiogheny River |
| Savage River | 29 mi | West | Potomac River |
| Wicomico River | 24 mi | East | Chesapeake Bay |
Major Lakes in Maryland
| Lake | Type | Region |
|---|---|---|
| Deep Creek Lake | Reservoir | West |
| Prettyboy Reservoir | Reservoir | Central |
| Liberty Reservoir | Reservoir | Central |
| Loch Raven Reservoir | Reservoir | Central |
| Triadelphia Reservoir | Reservoir | Central |
| Rocky Gorge Reservoir | Reservoir | Central |
| Centennial Lake | Reservoir | Central |
| Blairs Valley Lake | Natural lake | West |
| Lake Habeeb | Reservoir | West |
| Piney Reservoir | Reservoir | West |
Major River Basins in Maryland
Maryland’s river basins are largely centered around the Chesapeake Bay, which receives water from most of the state. Western regions also contribute to the Ohio River Basin, creating a mix of coastal and inland drainage systems.
- Chesapeake Bay Basin
- Potomac River Basin
- Susquehanna River Basin
- Patuxent River Basin
- Patapsco River Basin
- Nanticoke River Basin
- Choptank River Basin
- Pocomoke River Basin
- Youghiogheny River Basin
Maryland Rivers Facts
| State | Maryland |
| Total Rivers & Streams | 17,000+ miles of streams |
| Major Rivers | Potomac, Susquehanna, Patuxent |
| Total Waterway Length | 18,000+ miles |
| Main Drainage | Chesapeake Bay |
| Longest River | Susquehanna River |
| Shortest River | Severn River |
| Major River Basins | 9 Primary Basins |
| Primary Outlet | Atlantic Ocean |
| Key Uses | Water supply, recreation, fisheries, navigation |
| Longest River Within State | Potomac River |
| Number of River Basins | 8–10 Basins |
| Major Reservoirs | Deep Creek Lake, Liberty Reservoir, Prettyboy Reservoir |
| Primary Water Source | Surface water and reservoirs |
River Map OF U.S. 50 States - Click on State name for its River Map
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