Hope College in Holland, Michigan has all local organizations.

University of Redlands in CA has only locals, except for academic nationals. Our trustees disallow "social" national orgs on our campus. (several groups of students have attempted to charter nationals here and got rejected).
I feel having only locals really boosts the morale of local members. That way no one has an innate superiority complex.

Lee University in Tenessee
 

is made up of all locals. they are extremely well established, well run groups that are pretty old. There are also two colleges in Georgia: Shorter and crap i forget the other-that are all local or were until like this year. Don't know if they have nationals, but I do that as of very recently is was all local. (my sister was investigating private schools in the south)

A friend of my other sisters started the Xi Delta local at UGA. They have an awesome sisterhood with tons of alumna supprt but none of the expense of the Nationals. So, a great alternative to those who think sorority life is not in their reach at UGA. UGA also has Gamma Sigma Sigma-which is service, but those girls are soooooooo sweet and do tons of social stuff like mixers and datenights and formals and stuff. it's really just like any other social with a bigger emphasis on service. My sis brought home a bunch of girls from school and they are in it. They are so nice.Not local, but not NPC.

Actually, there are at least 5 colleges in Georgia that have only locals.

All our sororities are local (which is cause we are the only one) but the fraternities are national.

Re: Only Local
 

Good luck with that! There's a magic in being local--let them know you know it too! :)