Our oldest active chapter is the Delta chapter at University of Texas ~ Austin, founded in 1905.
My chapter, Eta Psi, just celebrated 5 years of sisterhood May 2, 2003 (we were a local who went through the colonization process with ADPi as the other local sororities on our campus went national at the same time).
Kinda sad that my chapter's no longer the baby....but so excited about Eta Omega at Centre College in Kentucky!