Ohio River Map showing major rivers in Ohio, River start and end point, county boundaries.
River Map of Ohio State
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Rivers and Waterways in Ohio
Ohio’s river systems are shaped by plains and rolling hills, with water flowing primarily into the Ohio River and the Great Lakes. Southern and eastern rivers drain into the Ohio River and eventually the Mississippi River, while northern rivers flow into Lake Erie. The state has a dense network of streams and tributaries, along with reservoirs and natural lakes that support water supply, recreation, and industry. These waterways play a key role in Ohio’s economy and environmental systems.
Major Rivers in Ohio
| River | Length (Approx.) | Region | Flows Into |
|---|---|---|---|
| Ohio River | 981 mi | South | Mississippi River |
| Scioto River | 231 mi | Central | Ohio River |
| Miami River | 160 mi | West | Ohio River |
| Little Miami River | 111 mi | Southwest | Ohio River |
| Muskingum River | 111 mi | East | Ohio River |
| Maumee River | 137 mi | North | Lake Erie |
| Sandusky River | 133 mi | North | Lake Erie |
| Cuyahoga River | 85 mi | North | Lake Erie |
| Great Miami River | 160 mi | West | Ohio River |
| Hocking River | 102 mi | Southeast | Ohio River |
| Auglaize River | 113 mi | West | Maumee River |
| Blanchard River | 103 mi | Northwest | Auglaize River |
| Portage River | 41 mi | North | Lake Erie |
| Rocky River | 45 mi | North | Lake Erie |
| Vermilion River | 66 mi | North | Lake Erie |
| Black River | 103 mi | North | Lake Erie |
| Grand River | 102 mi | North | Lake Erie |
| Mahoning River | 113 mi | Northeast | Beaver River |
Major Lakes in Ohio
| Lake | Type | Region |
|---|---|---|
| Lake Erie | Natural lake | North |
| Grand Lake St. Marys | Reservoir | West |
| Indian Lake | Reservoir | West |
| Mosquito Lake | Reservoir | Northeast |
| Alum Creek Reservoir | Reservoir | Central |
| Salt Fork Lake | Reservoir | East |
| Pymatuning Reservoir | Reservoir | Northeast |
| Caesar Creek Lake | Reservoir | Southwest |
| Buckeye Lake | Reservoir | Central |
| Atwood Lake | Reservoir | East |
Major River Basins in Ohio
Ohio’s river basins are split between those draining into the Ohio River and those flowing north into Lake Erie. These basins support agriculture, industry, and urban water systems throughout the state.
- Ohio River Basin
- Lake Erie Basin
- Scioto River Basin
- Muskingum River Basin
- Great Miami River Basin
- Maumee River Basin
- Cuyahoga River Basin
- Sandusky River Basin
- Mahoning River Basin
Ohio Rivers Facts
| State | Ohio |
| Total Rivers & Streams | 60,000+ miles of streams |
| Major Rivers | Ohio, Scioto, Muskingum, Miami |
| Total Waterway Length | 65,000+ miles |
| Main Drainage | Ohio River & Lake Erie |
| Longest River | Ohio River |
| Shortest River | Portage River |
| Major River Basins | 9 Primary Basins |
| Primary Outlet | Mississippi River & Great Lakes |
| Key Uses | Water supply, industry, agriculture, recreation |
| Longest River Within State | Scioto River |
| Number of River Basins | 8–10 Basins |
| Major Reservoirs | Alum Creek, Caesar Creek, Mosquito Lake |
| Primary Water Source | Surface water and Lake Erie |
River Maps of the 50 U.S. States – Click on a State to View Its River Map
- Alabama River Map
- Alaska River Map
- Arizona River Map
- Arkansas River Map
- California River Map
- Colorado River Map
- Connecticut River Map
- Delaware River Map
- Florida River Map
- Georgia River Map
- Hawaii River Map
- Idaho River Map
- Illinois River Map
- Indiana River Map
- Iowa River Map
- Kansas River Map
- Kentucky River Map
- Louisiana River Map
- Maine River Map
- Maryland River Map
- Massachusetts River Map
- Michigan River Map
- Minnesota River Map
- Mississippi River Map
- Missouri River Map
- Montana River Map
- Nebraska River Map
- Nevada River Map
- New Hampshire River Map
- New Jersey River Map
- New Mexico River Map
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- North Dakota River Map
- Ohio River Map
- Oklahoma River Map
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- South Dakota River Map
- Tennessee River Map
- Texas River Map
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- West Virginia River Map
- Wisconsin River Map
- Wyoming River Map