I just found an interesting publication from what used to be the Ohio Department of National Resources Division of Water Resources.

http://water.ohiodnr.gov/soil-conservation/ohio-soil-regions

The department has since been relocated. Still, I thought the pdf that was posted was really interesting and I wanted to share.

They split the soil of Ohio into 12 regions and detail various characteristics of the soil (bedrock less than 40inches below surface, more than 27 percent clay in topsoil).

I think it's helpful to get a sense of how the soil where you live differs from other places in Ohio or anywhere else.