Phi Psi () is an American professional fraternity in the field of textiles and manufacturing engineering. It was estalblished at the Philadelphia College of Textiles & Science in 1903.
Phi Psi was established as a professional textiles fraternity on at the Philadelphia College of Textiles & Science, in Philadelphia, Pennsylvania. Its five founders were Robert M. Baeny, Paul Benninghoffen, Henry W. Eddy, Harold H. Hart, and Charles A. Kalenbach.
Established at the turn of the 20th Century, Phi Psi had three aims:
The fraternity expanded to several Massachusetts textile schools, then the center of textile manufacturing in the United States. Beta chapter was formed at Southeastern Massachusetts Dartmouth, followed by and Gamma chapter at Lowell Tech in 1904. Chapter naming traditions may have diverged: the Gamma chapter at Lowell Tech may have inserted the Gamma from its name into its national name, calling itself the Phi Gamma Psi fraternity.
The fraternity's first alumni chapter was established in in Boston, Massachusetts. When the nation's textile industry center shifted to the southern states, chapters were established in Georgia, North Carolina, South Carolina, Texas, and Alabama. A total of ten collegiate chapters were formed, along with twelve alumni chapters.
Members from Alpha chapter began a search for a national social fraternity to join. In what appears to be a friendly schism, a majority or all of its members formed a separate organization from Phi Psi on when they were accepted as the Pennsylvania Omicron chapter of Sigma Phi Epsilon. Yet the Alpha chapter of Phi Psi continued independently on the campus, remaining active today.
In 1991, the fraternity had 6,000 members. The fraternity is now coed. It held its 111th convention in Atlanta, Georgia in 2018.
Phi Psi's motto is . Its badge is described as a diamond-shaped emblem with a gold border andfour perpendicular gold bars on a black face. The Greek letters and are in the center, rendered in gold.
Its colors are black and gold. The fraternity's flower is the Yellow Tea Rose. Its quarterly publication is The Phi Psi Quarterly.
Following is a lists of Phi Psi chapters. Active chapters noted in bold. Inactive chapters and institutions are noted in italics.