Ohio River

The Ohio River is one of the most important tributaries to the Mississippi River. It is 981 miles long and it forms boundaries for the states of Ohio, Kentucky, Illinois, Indiana, and West Virginia before finally going to its headwaters in Pennsylvania. It is its widest a little to the West of downtown Louisville, where it is one mile wide. Cities on the Ohio River include Evansville, Indiana, Paducah, Kentucky, Cincinnati, Ohio, Pittsburgh, Pennsylvania. The river begins in Pittsburgh.  The Wabash, Kentucky and the Tennessee Rivers flow into the Ohio.

 Other websites 
Historic Ohio, the magazine 
Ohio Historical Preservation Group 
Ohio River Valley Families Online Searchable Database, a genealogy resource
Image at the confluence with the Mississippi River
Watershed information 
Ohio River Forecast Center, which issues official river forecasts for the Ohio River and its tributaries.

Category:Rivers of Kentucky
Category:Rivers of Illinois
Category:Rivers of Indiana
Category:Rivers of Ohio
Category:Rivers of Pennsylvania
Category:Rivers of West Virginia