LogFAQs > #941245757

Kentucky, Indiana, and Ohio (is the order you would probably hear it from Kentuckians who don't live in Northern Kentucky)

I've heard it my entire life and seen businesses say they serve the "tri-state area" while having the outlines of those three states on their trucks or whatever. It never once occurred to me to think that it had anything to do with Cincinnati.

Kentucky's biggest city is across a river from Indiana so most of us who aren't near Cincy think of Indiana as more of the associated state

That said, Cincinnati's major airport is in Kentucky, so that's a significant association too. Rivers, man.