I don't think of us being a "Southern" sorority, in terms of founding. Even so, our 2nd and 3rd chapters were established in southern states (LA and TN). Like Sarah said, we've got a huge Southern presence these days. From the international website, it looks like the 3 states with the highest number of chapters (and I believe all of these are active chapters) are Alabama, Tennessee and Kentucky. Here's the breakdown
Alabama--8 chapters
Arkansas--1 chapter
Florida--5 chapters
Georgia--4 chapters
Kentucky--6 chapters
Louisiana--4 chapters
Maryland--3 chapters (although I never think of Maryland as South, apparently it's classified as "Southern")
Mississippi--1 chapter
North Carolina--3 chapters
South Carolina--0
Tennessee--7 chapters
Virginia--1 chapter
That's 43 chapters in 12 southern states. Since Sarah got 49 chapters in the south, I'm sure I'm missing a state or two in there somehow

.
In the north, we've got 5 Canadian chapters (in Alberta, Ontario, 3 Quebec), 4 in NY State, 4 in Pennsylvania, and 1 in Maine.
Kind of interesting, isn't it?
Roses,
Christin