Phi Delta Psi Fraternity, Inc. (ΦΔΨ) is a social fraternity. It was founded as an African American fraternity in 1977 on the campus of Western Michigan University.

Phi Delta Psi was founded as an African American fraternity on the predominately white campus of Western Michigan University on March 27, 1977.^[1] Its Founding Fathers include Kwameh Barnett, Derek Bell, Richard Bell, Gregory Brown, Charles Cameron, Gerald Dixon, Denis Jones, Peter McClain, Michael Mosby, and Daulton Tansil.^[2]

Phi Delta Psi was founded on eternal honor, perseverance, leadership, achievement, and brotherhood. Its founding fathers wanted to create a fraternity that would meet the social, economic, and political challenges of African American men. The fraternity continues to honor its founders' mantra of community service for the benefit of its universities, families, communities, and the world.

One of the fraternity's first initiatives was its Sickle Cell Testing Initiative, followed by Great American Smokeout.^[2] The group's current project is Stopping Aids by Forever Educating or the S.A.F.E Initiative.^[3] Its publication is The Lion's Den.^[4]

Following are the Phi Delta Psi chapters.^[5] Active chapters are indicated in bold. Inactive chapters are shown in italic. Note that the Phi Delta Psi local fraternity established in 1966 at Southern New Hampshire University has never been affiliated with this organization.^[6]

• List of African-American fraternities
• List of social fraternities and sororities