Sigma Delta Tau (ΣΔΤ) is a national sorority and member of the National Panhellenic Conference, was founded March 25, 1917 at Cornell University in Ithaca, New York. The original name, Sigma Delta Phi, was changed after the women discovered a fraternity with the same name already existed. Today, Sigma Delta Tau has over 40,000 initiates from over 90 chapters around the United States.

Sigma Delta Tau was founded by 7 Jewish women; Dora Bloom (Turteltaub), Amy Apfel (Tishman), Marian Gerber (Greenberg), Grace Srenco (Grossman), Inez Ross, Regene Freund (Cohane), Lenore Rubinow.

Dora Bloom Tureltaub	Amy Apfel Tishman	Marian Gerber Greenberg	Grace Srenco Grossman	Inez Ross	Regene Freund Cohane	Lenore Rubinow

There is no religious requirement for membership to the fraternity, nor is it affiliated with any one religion. Colors are cafe au lait and old blue. Symbol is the Torch, as is the name of the national publication.

The national philanthropy of Sigma Delta Tau is PCAA (Prevent Child Abuse America).

The mission of Sigma Delta Tau is to enrich the college experience of women of similar ideals, to build lasting friendships and to foster personal growth. Sigma Delta Tau shall encourage each member by providing intellectual, philanthropic, leadership and social opportunities within the framework of mutual respect and high ethical standards.

The current badge is a jeweled gold torch. On the front of the torch are the Greek letters ΣΔΤ, with 6 pearls and a diamond. The badge is worn strictly as an emblem of membership and only by initiated members.

New Members of Sigma Delta Tau wear a different badge, a gold torch enameled in old blue, representing the colors of the sorority, cafe au lait and old blue. The new member pin is only worn during the new member period, after which it is returned to the chapter.

The teddy bear is the official mascot of Sigma Delta Tau. The official flower is the golden tea rose and the sorority jewel is the lapis lazuli. The sorority coat of arms combines all the elements of Sigma Delta Tau.