Pi Sigma Alpha (ΠΣΑ or PSA), the National Political Science Honor Society, is the only honor society for college and university students of political and social sciences in the United States. Its purpose is to recognize and promote high academic achievement in the field of political science. It is a member of the Association of College Honor Societies (ACHS) and adheres to all the standards set by ACHS for an upper-division, specialized honor society. Pi Sigma Alpha is not a social fraternity or club.