Tau Kappa Alpha (ΤΚΑ) was a collegiate honor society devoted to the promotion of public speaking (forensics).

Established in 1908, it merged with Delta Sigma Rho, a similar society, to form Delta Sigma Rho-Tau Kappa Alpha in 1963 Tau Kappa Alpha was organized on May 13, 1908, at Indianapolis, Indiana, primarily through the efforts of Oswald Ryan, a student at Butler University[1] and Hugh Thomas Miller who was the Lieutenant Governor of Indiana.

[3] They were assisted by James J. Boyle, G. Claris Adams, Herbert R. Hyman, William Heilman, and Roger W. Wallace.

This plan aimed to enable the election of desirable men from colleges not large enough or perhaps not strong enough to warrant the installation of or to maintain a separate chapter.

[3] The society's emblem was key in the shape of a scroll, featuring the Greek number of for the year of establishment and the Greek letters ΤΚΑ, surrounded by eleven stars representing the eleven founders and a laurel wreath of reward.