List of RPI fraternities and sororities

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The following is a list of fraternities and sororities at Rensselaer Polytechnic Institute. As of 2015, there were 29 active fraternities, five sororities, and one co-ed service fraternity.[citation needed] The governing body of all fraternities is the Inter-Fraternity Council.[1]

The RPI Union

Active fraternities[edit]

Notable alumni include Al Beard ('81), Michael John Matla ('81), and Paul Stockert ('83).
  • Chi Phi (ΧΦ), Theta Chapter, founded 1878
The Chi Phi Theta Chapter, founded in 1878, is one of the oldest fraternities on campus and owns two houses next door to each other at 1981 and 1985 15th St., across from the Quad and Student Union.
1867-1966 and 2014-present (reactivated chapter). DKE used to own the current admissions building located next to Theta Xi and across from both RSE and the Student Union.
Lambda Chapter of Delta Phi has a unique history since its founding in 1864 on campus that includes three Rensselaer presidents (including George Low, known for putting the first man on the moon) and about 16 structures that are named for Delta Phi alumni. RPI buildings so named include the George M. Low Building, Livingston Houston Fieldhouse, Cornelius Barton Hall, Nason Hall, Mason Lab (no longer in existence), Hearne Dormitory, Church I - VI and Caldwell Lab.
Upsilon Chapter of Delta Tau Delta is located at 133 Sunset Terrace, neighboring Acacia and Phi Kappa Theta. The Delts' house is one of the largest on campus.
Located at 200 Sunset Terrace
  • Phi Gamma Delta (ΦΓΔ; FIJI), Tau Nu Chapter, founded 1984
  • Phi Iota Alpha (ΦΙΑ; Phiotas), Alpha Chapter, founded December 26, 1931
  • Phi Kappa Theta ('ΦΚΘ; Ski Lodge), Sigma Chapter, founded 1925
  • Phi Mu Delta (ΦΜΔ; Phi Mud), Nu Theta Chapter, founded 1918
    Crest of Phi Mu Delta Fraternity
  • Phi Sigma Kappa (ΦΣΚ; Phi Sig or Church), Gamma Tetarton Chapter
  • Pi Delta Psi (ΠΔΨ), Theta Chapter, founded 1997
Pi Delta Psi is currently the only Asian interest Greek organization on campus.
Epsilon Iota, founded in 1954, was founded in 1954 as a chapter of TEP (Tau Epsilon Phi) in December 1957. The chapter left TEP in January 1978 to become a co-ed local fraternity. Epsilon Iota officially became the 37th chapter of the Psi Upsilon international fraternity in 1982, and it remains co-ed with approximately equal numbers of male and female brothers. The chapter currently resides at 2140 Burdett Avenue in Troy. The Epsilon Iota Chapter holds the record for longest number of days (178) in "hockey line" at RPI, breaking the previous record of 33 days.
The Rensselaer Society of Engineers was founded as the Pi Eta scientific society in 1866, and became the Rensselaer Society of Engineers in 1883.
Crest of the Rensselaer Society of Engineers
Located at 12 Myrtle Ave.
The Delta Psi Chapter of The Sigma Chi Fraternity was chartered on December 2 1950. Before that, Sigma Chi existed on the RPI campus as a local fraternity known as Phi Epsilon Phi. Sigma Chi is currently located at 58 Pinewoods Avenue.
Location: 2005 15th Street
Located at 2100 Burdett Ave.
  • Theta Xi (ΘΞ; Zoo), Alpha Chapter, founded April 29, 1864
The Alpha Chapter of Theta Xi is the oldest active fraternity and the second oldest chapter house at RPI. Distinguishable alumni include former RPI President Palmer C. Ricketts (A84), William H. Wiley (A11), Mordecai T. Endicott (A21), James Hall (A38), Emil H. Praeger (A272), and Allen B. Dumont (A349) all of which have been inducted into the RPI Hall of Fame. Numerous campus buildings and rooms are named after Alpha Chapter alumni: the Darrin Communications Center, named after David M. Darrin (A566); Ricketts Building, named after Palmer C. Ricketts (A84); Waite Dormitory, named after Christopher Champlain Waite (A3) who is one of the fraternities founding members; Hall Hall named after James Hall (A83); DuMont room in the Student Union named after Allen B. DuMont (A349); and many more. The origin of the nickname "The Zoo" or just "Zoo" is rumored to be from the early 1960s when Theta Xi brothers engaged in an altercation with another fraternity during an RPI hockey game. It is believed that RPI's newspaper, The Poly, stated in an article about the altercation that the brothers of Theta Xi acted like "a zoo" and the rest is history.
  • Zeta Psi (ΖΨ; Zetes), Pi Chapter, founded January 13, 1865
The Pi Chapter went inactive in 1894 and was reactivated in 1951. It remained active until the alumni/elders shut down the chapter house in 1978 (for disciplinary reasons) and reactivated the chapter in 1979 with all new members. The Pi Chapter has remained in continuous operation since the second reactivation. It is located at 25 Belle Avenue.[5]

Active sororities[edit]

The governing body of all sororities is the Panhellenic Council.[6]

Alpha Gamma Delta was founded on May 30, 1904 at Syracuse University. The Zeta Eta chapter of Alpha Gamma Delta is one of over 110 chapters nationwide.
Alpha Phi was founded at Syracuse University in 1872 by ten women. The Theta Tau chapter of Alpha Phi is one of over 150 chapters in both the United States and Canada. Alpha Phi is one of four international sororities at RPI.
ΑΩΕ is a social and professional sorority for women in engineering and technical sciences. It is a member of the Professional Fraternity Association at the international level; however, the Tau chapter is also a member of the local Panhellenic Council.
Pi Beta Phi was founded by 12 women at Monmouth College in Monmouth, Illinois on April 28, 1867. Pi Phi is the first women's fraternity to be modeled on the men's groups and the first to start a chapter at another college. The New York Epsilon chapter of Pi Beta Phi was installed on November 17, 1984. The chapter began as Kappa Phi, a local sorority founded on April 27, 1982, as the third sorority on campus. Their chapter house is at 8 Sherry Road.
Sigma Delta is a local, professional sorority which was incorporated on March 29, 1996 and founded on April 12, 1996. While based on Latin American values, over the years they have grown to a multicultural organization with members from a variety of backgrounds and cultures.

Inactive chapters (fraternities/sororities)[edit]

Serving five years of campus suspension; rushing fall 2021
The Delta Charge of Theta Delta Chi was RPI's first fraternity. Theta Delta Chi served as the sole fraternity on campus until the founding of Sigma Delta in 1859. The Charge had a prominent existence at Rensselaer throughout much of the 19th century until its charter was surrendered in 1896 because of low membership.
Inactive sorority


  1. ^ "Inter-fraternity Council" Check |url= value (help). Retrieved 3 January 2012. 
  2. ^ History
  3. ^
  4. ^
  5. ^ [1]
  6. ^ "Panhellenic Council" Check |url= value (help). Retrieved 3 January 2012. 

External links[edit]