Omicron Sigma Chapter of Delta Sigma Theta Sorority, Inc. was organized on April 30, 1930 at the home of Mary Smith Buford, located a few miles west of Tulsa. Grand Chapter First Vice President, Jeanette Tripplett-Jones of Lambda Chapter, established Omicron Sigma Chapter, which later became Tulsa Alumnae Chapter. Omicron Sigma was the first chapter of Delta Sigma Theta Sorority, Inc. chartered in Oklahoma.

Fourteen progressive women listed below conceived this graduate chapter:

• Otie Lee Bacoats
• Opaline Bradley
• Jessie Brice
• Mary S. Buford
• Alma Ford
• Mable O. Gates
• Jobie Holderness
• Gracie A. Hill
• Euela Gray Ingram
• Frances Langrum
• Corrine Lythcott
• Alva V. Marsh
• Carrie B. Neely
• Corine Ramsey

In realizing the mission of Delta Sigma Theta, the community service projects and programs developed by Tulsa Alumnae chapter supports the organization’s Five-Point Program Thrust which are listed below:

• Educational Development
• Economic Development
• Physical and Mental Health
• Political Awareness and Involvement
• International Awareness and Involvement