Oldest local sororities that have remained local

[Sister Havana]

All the sororities (and fraternities) at Augustana College in IL are local. Two of the sororities are over 100 years old: Sigma Kappa Tau and Sigma Pi Delta. (Two others are close: 96 and 90 years old)

[AOX81]

Originally Posted by FL_grad_student

My undergrad alma mater only had locals.

Prior to 1917, the school had national organizations that were forced to close when the Board made the decision to eliminate Greek life.

The oldest local sorority on campus, Pi Kappa, was founded in 1918 and started as a social group called the Peanuts. The TTK founders were the remaining members of the Kappa Kappa Gamma Beta Gamma chapter, originally founded in 1876. The other NPC groups also formed locals but only one group can trace their history all the way back. The others have come and gone over time.

The oldest fraternity on campus was also founded in 1918, by the members of the Alpha Lambda chapter of Beta Theta Pi.

Wooster?

[littlesquirrel]

Not super old, but the local at my undergrad was founded in 1921.

[JayhawkAOII]

According to their website, Willard Sorority at Nebraska Wesleyan is the oldest local in the country with a founding date of 1889.