Phi Sigma Beta (ΦΣΒ) may refer to:
- Phi Sigma Beta (Puerto Rico), a former "zone" or country district of US chapters of Phi Sigma Alpha, a Puerto Rican-based fraternity
- Tau Delta Phi, a high school fraternity for American Jewish boys, formed June 22, 1910 as Phi Sigma Beta, which was reestablished as the collegiate fraternity Tau Delta Phi in 1914.
- Phi Sigma Gamma, a professional fraternity for osteopathic medicine formed under the name Phi Sigma Beta prior to 1915, which merged with Phi Omega Gamma to form Phi Sigma Gamma by 1916.
- Phi Sigma Beta, a dormant general women's sorority formed at Pace University in 1951, which in the 1990s had created three additional chapters. Some of its chapters survived into the 2000s.
This disambiguation page lists articles associated with the title Phi Sigma Beta.
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