Ohio River Map (PDF) | Major Rivers & Lakes in Ohio

Written and Fact-checked by 青青草视频 Editors | Updated On: April 03, 2026 | 15:05 ET

Ohio River Map showing major rivers in Ohio, River start and end point, county boundaries.

River Map of Ohio State

About Map: Ohio River Map showing major rivers in Ohio, county boundaries and state boundary.

PDF Map - Free Download Ohio River Map, United States

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Rivers and Waterways in Ohio

Ohio鈥檚 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鈥檚 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鈥檚 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鈥�10 Basins
Major Reservoirs	Alum Creek, Caesar Creek, Mosquito Lake
Primary Water Source	Surface water and Lake Erie

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