Well, Ohio is "The Buckeye State" for a reason, though I've never known anyone who eats buckeyes, except for the confection named after the nut.
Most of the nuts that grow here aren't eaten by humans (though probably could be, I suppose), but the one that does grow here and is eaten by humans is the black walnut, which has a near cult-like following. I grew up less than 10 miles from the Black Walnut Festival, which does attract people from all over.
Nasty, nasty things. The shell is covered in a smelly husk that'll dye your hands a bright yellow-green that won't come off, the shell is harder than a coconut, and then once you get to the meat inside, you're rewarded with a musty, moldy-tasty hunk of sour.