Sigma Tau Delta is the International English Honor Society. Its purpose is to bestow distinction upon undergraduates, graduates, and scholars in academia, as well as on professional writers who have recognized accomplishments in linguistic or literary realms of the English language.

Through the chartering of chapters on the campuses of over 400 hundred colleges and universities throughout the United States and Canada, Sigma Tau Delta affords exceptional students in the field of English an opportunity for furthering culture, for formulating ethical principles, for developing skills in creative and critical writing, and for fostering a spirit of fellowship.

Student members of Sigma Tau Delta may gain prestige through publication in The Rectangle and may achieve international recognition through annual awards and scholarships given for graduate study, teaching, and other professional purposes. Association with eminent persons in the profession of English is accorded students at the regional conventions and at the biennial international convention.

Specific scholarship requirements for student membership in the Theta Chi chapter include: at least three semesters of coursework at Susquehanna, at least three courses in English (above the Writing and Thinking), at least a 3.0 G.P.A. in English courses, and rank in the top 35% of the class. Those students who are majoring or minoring in English are eligible to become active members, and other students who meet our criteria are eligible to become associate members; the only distinction is that associate members may not hold office. Campus advisor is Professor Karen Mura.