Welcome to Delta Sigma Phi. Nationally established in 1899, the organization has long stood for the time honored traditions created by our founders while also embracing the new century with the philosophy of our motto, "Better Men. Better Lives." Delta Sigma Phi is brotherhood for a lifetime as we live by our core values: Culture, Harmony and Friendship.

Formed in 1955, our chapter was the first nationally recognized fraternity on the Cal Poly campus. Over the past fifty years, our house has seen many changes and has evolved into one of the largest fraternities on campus. Due to our great Greek relations, a prime location, an exciting social calendar, strong interfraternity athletics, great alumni support and outstanding active membership, we see no end to our house's development.