| Letters: | Greek, Ancient (to 1453);: ΠΣ |
| Pi Sigma | |
| Motto: | Paglingkuran ang Sambayanan ("Serve the People"); and Paragon of Scholarship |
| Birthplace: | University of the Philippines Diliman |
| Affiliation: | Independent |
| Status: | Active |
| Type: | Service |
| Scope: | National (Philippines) |
| Colors: | Red Gold Black |
| Country: | Philippines |
| Emphasis: | Socio Political |
| Chapters: | 40+ |
| Nickname: | Paragons |
Pi Sigma Fraternity (Greek, Ancient (to 1453);: ΠΣ) is a socio-political fraternity based in the University of the Philippines Diliman. The fraternity commits itself to the principles of "Paglingkuran ang Sambayanan (Serve the People)" and "Paragon of Scholarship". It was established in 1972.
On August 15, 1972, eight University of the Philippines Diliman met in the Molave Residence Hall and established Pi Sigma.[1] The fraternity's founders were Emilio Aguinaldo, Noel David, Stephen David, Onofre Galvez, Francisco Gomez, Oscar Manalaysay, Cesar Romero, and Robert Sombillo.[2] At the time, student organizations were banned on campus but Greek letter fraternities had been allowed to continue to operate.
Additional chapters were created across the Philippines, including University of the East (Manila and Caloocan City campuses), University of Santo Tomas, Adamson University, FEATI University, Technological Institute of the Philippines, and Philippine School of Business Administration, University of the Philippines Manila, University of the Philippines Los Baños, and University of the Philippines Baguio. Community chapters were established in Bacolod, Baguio, Bicol, Cavite, Cotabato, Davao, Iloilo, La Union, Laguna, Mindanao, Pampanga, and Tarlac. The Pi Sigma Delta Sorority (Greek, Ancient (to 1453);: ΠΣΔ) is its counterpart socio-political sorority founded on February 21, 1975.
The fraternity held its first national convention in Aringay, La Union in March 1979 where its fist constitution and by-laws were adopted. Its second national convention was held at the University of the Philippines Diliman from April 6 to 10, 1983.
The fraternity started its Annual UP Pi Sigma Fraternity Open Debate Tournament in 1988. It consists of more than forty school and community chapters.
The fraternity's colors are red, gold, and black. The fraternity's name was selected for the Greek letters Greek, Ancient (to 1453);: ΠΣ, which represent the mottos "Paglingkuran ang Sambayanan (Serve the People)" and "Paragon of Scholarship". Its members call themselves Paragons.