Alpha Theta may refer to: Fraternities and sororities Alpha Theta (sorority), a former college sorority, later named Alpha Delta Theta, that merged with Phi Mu fraternity Alpha Theta, a gender-inclusive local fraternity at Dartmouth College, Hanover, New Hampshire Alpha Theta Alpha, a local sorority at La Salle University of Philadelphia, Pennsylvania Alpha Theta Omega, a Christian sorority with several chapters in the United States Neuroscience Alpha-theta training, an area of brain wave science; see