Baltimore is a neighbouring city of Washington, DC
I don't see how that'd be considered south.
That said, a quick Google search shows that Maryland is below the Mason-Dixon line which is the general north-south divide.
I guess in my mind Virginia and West-Virginia are not south, but Kentucky is. But I have no rhyme or reason for that. Maybe it's that George Washington was from Virginia and I don't think of him as southern (by extension if Virginia isn't southern then neither is West Virginia).
Regardless, I'm Canadian, unless you're from Alaska, they're all Southerners
