On Thanksgiving of 1899, Johnnie Wright, Alice Harrell, and Tillie Price founded a local sorority at Southwestern University with the help of the Brothers of Kappa Sigma Iota Chapter.  The eleven charter members called themselves Beta Sigma, wrote their own constitution, and became the first sorority on campus.  On February 7, 1907, Beta Sigma was adopted as Zeta Chapter of Alpha Delta Pi.

Many of our early sisters did notable work for the sorority at the National level. Abigail Davis organized Nu Chapter at Randolph-Macon Women's College in Lynchburg, Virginia and helped develop the ritual. Paula Garrison was inspector for two terms, and Ida Donovan assisted in the installation of Alpha Zeta Chapter at Southern Methodist University. In 1956, a scholarship award was established in honor of Flora Root Cody, Zeta Chapter alumna and long-time State Membership Chairman for Texas. 

Since our humble beginning, Zeta Chapter has moved forward to become a premier chapter in the nation. In 1909, Zeta Chapter hosted the Alpha Delta Pi National Convention at the Kappa Alpha Order fraternity house. Zeta Chapter hosted the Alpha Delta Pi State Convention in 1956.

In 1989, Zeta Chapter was named to the Golden Lion Hall of Fame for the first time—the highest honor that recognizes many years of excellence in all areas of sorority life, only given every other year. Since then, Zeta has received the Golden Lion Award on a consecutive basis. In 1991, Zeta Chapter served as a pilot chapter for the new Total Membership Education Program, and in 1992, Zeta was honored as the chapter with the highest GPA in the nation.

In addition, we look forward to celebrating our 100th year on campus on February 7th 2007 as the second oldest active chapter of Alpha Delta Pi. We celebrated our 150th international anniversary in 2001 with the donation of a tree and a plaque outside the Sharon Lord Caskey Community Center and a beautiful stained glass, which hangs outside the building. Zeta Chapter, with her rich history, will surely enjoy sisterhood and success for years to come.