Phi Omega Sigma may refer to the six unrelated student organizations:
- Phi Omega Sigma (College of Wooster) at The College of Wooster, Ohio, United States (founded in 1913, de-chartered in 2017)
- Phi Omega Sigma Christian Fraternity, Inc., a co-educational fraternity in Missouri State University, United States (founded in 2004)
- Phi Omega Sigma, a women's social club in Oklahoma Baptist University, United States
- Phi Omega Sigma, nicknamed "Possums", a housing group in Grove City College, Pennsylvania, United States
- Phi Omega Sigma, a fraternity founded in University of Puerto Rico at Arecibo (founded in 2000)
- Phi Omega Sigma (Philippines), also known as "POSANS", a collegiate social-interest and semi-service fraternity/sorority and an international alumni association (founded in 1968)
This disambiguation page lists articles associated with the title Phi Omega Sigma.
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