"Back Home in Indiana" is indeed a different song from "Banks of the Wabash." Although it was probably a "Tin Pan Alley" pop song originally, it's a staple of the traditional-jazz repertoire, dating back to the earliest days if jazz in New Orleans. I'm pretty sure that Louis Armstrong recorded it.

Speaking of Indiana, "Wabash Cannonball" is a widely played folk/old-time/bluegrass classic whose subject matter lies mostly north of the Mason-Dixon line (and entirely north of the Ohio River, perhaps a more meaningful boundary between North and South).

The Mason-Dixon line, by the way, is the boundary between Pennsylvania and Maryland, a straight east-west line named for the surveyors who charted it back in the 1700s. If extended straight west, it cuts across the central-to-southern parts of Ohio, Indiana, Illinois, etc., states normally considered "northern."