This is a list of social fraternities and sororities in Puerto Rico. There are a number of service, professional, and honorary fraternities and sororities from the United States which have chapters in Puerto Rico. The following list is composed of Greek Letter social organizations founded in Puerto Rico, by Puerto Ricans. The large majority don't have chapters outside the island. An exception to this is those organizations that are members of the Concilio Interfraternitario Puertorriqueño de la Florida, the five fraternities that are members of the CIPFI are also members of the "Concilio Interfraternitario de Puerto Rico"'along with the two oldest Puerto Rican sororities.
| Fraternity | Nickname | Founding Date | Type | Scope |
|---|---|---|---|---|
| Phi Eta Mu (ΦHM)* | Phi Etas | 1923 | University | International |
| Phi Sigma Alpha (ΦΣΑ)* | Sigmas | 1928 | University | International |
| Nu Sigma Beta (NΣB)* | Nu Sigmas | 1937 | University | International |
| ACACIA (FJA) | Acacistas | 1938 | High School and University | National |
| Alpha Beta Chi (ABX)* | Alpha Betas | 1941 | University | International |
| Phi Delta Gamma (ΦΔΓ)* | Phi Deltas | 1942 | University | International |
| Zeta Mu Gamma (ΖΜΓ) | Zetas | 1943 | High School | Local |
| Phi Epsilon Chi (ΦEX) | Phi Epsilon | 1943 | University | International |
| Phi Delta Sigma (ΦΔΣ) | Phi Delta Sigma | 1953 | University | National |
| Alpha Omicron Sigma (AOΣ) | Omicrones | 1957 | University | National |
| Rho Omicron Rho(POP) | Rhomicrones | 1957 | University | National |
| Zeta Phi Beta (ZΦB) | Zetas | 1957 | University | National |
| Delta Phi Delta (ΔΦΔ) | - | 1957 | Non-collegiate | Local |
| Phi Zeta Chi (ΦZX) | Phi Zetas | 1958 | University | International |
| Phi Eta Sigma (ΦHΣ) | - | 1959 | High School | Local |
| Delta Phi Theta (ΔΦΘ) | Los Deltas | 1961 | University | National |
| Lambda Phi Sigma (ΛΦΣ) | - | 1986 | University | National |
| Alpha Sigma Upsilon (ΑΣΥ) | - | 1990 | University | National |
| Sigma Phi Chi (ΣΦX) | - | 2001 | University | Local |
| Sorority | Nickname | Founding Date | Type | Scope |
|---|---|---|---|---|
| Mu Alpha Phi (MAΦ)* | Mus | 1927 | University | International |
| Eta Gamma Delta (HΓΔ)* | Etas | 1928 | University | International |
| Mu Iota Alpha (MΙA) | - | 1936 | Non-collegiate | Local |
| Joy Seekers Sorority (JSS) | Joys | 1952 | High School | Local |
| Phi Delta Kappa (ΦΔK) | Kappas | 1958 | High School | Local |
| Zeta Phi Sigma (ΖΦΣ) | Zetas | 1965 | University | National |
| Eta Phi Zeta (HΦΖ) | - | 1969 | University | National |
| Rho Omicron Chi (POX) | Las Chi | 1970 | University | Local |
| Delta Phi Eta (ΔΦH) | Las Deltas | 1982 | University | National |
| Rho Omicron Sigma (POΣ) | Las Rho | 1986 | University | ?? |
| Eta Sigma Alpha (HΣA) | - | 1990 | University | National |
| Phi Lambda Omega (ΦΛΩ) | − | 2006 | University | National |
| Sigma Delta Nu (ΣΔN) | - | 2007 | University | Local |
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