UC Riverside has it's own tartan: http://www.pipeband.ucr.edu/tartan.html

I think Radford University in Virginia probably has its own tartan, but if so, they sure don't make it obvious.

Furman University in S.C. has one...http://www.furman.edu/press/pressarchive.cfm?ID=3720

Apparently the University of North Carolina has a tartan as well, but again...what is it? http://www.uncg.edu/cha/bot/minutes/minutes_sept_04.pdf...look at the very end of that document for mention of it.

Alma College has for their mascot "The Scots" so you'd think they'd have a tartan but I sure didn't find one, and you can't buy anything tartan from their bookstore, online.

Maryville college has a really nice tartan.. http://www.maryvillecollege.edu/alum...-unveiling.asp

Monmouth College also has their own tartan: http://www.monm.edu/faq/alumni.htm...llook down this page, you'll find the reference

Carnegie Mellon University has it's own tartan, but darned if I can find a pic of it without browsing the STA. I mean, seeing at their mascot is "The Tartans" and they have a University Pipe Band and they're the only college in the USA to offer a major in bagpipes, you'd THINK.....
This hints at it...

Hope that helps!