Fraternities and Sororities have a rich legacy and history at Oregon State University.  We've included a timeline of Fraternity and Sorority Life (FSL) below as well as several links to other resources outlining the history of our diverse community.  Enjoy also browsing our other tabs on this website that detail history related to specific areas of FSL at OSU.

Fraternities and Sororities celebrated 100 years on campus in Spring 2015.  Check out the links below to learn more about this milestone:


Historical Timeline of Fraternities and Sororities at Oregon State University

compiled by Erika Bellingham, class of 2015

1856: Corvallis Academy opens as the first community school in the area.

1882: Alpha Tau Omega Alpha Sigma chapter charters at Oregon Agricultural College (the chapter was closed 6 months after initial opening).

1883: Corvallis Academy becomes renamed Oregon State Agricultural College.

1905: Gamma Delta Phi became the first permanent Greek letter social organization on campus in April.

1909: Gamma Sigma Delta: “The Honor Society of Agriculture chapter established.

1915: Alpha Chi Omega Chi chapter chartered- the first national sorority at Oregon Agricultural College. Shortly followed by Kappa Sigma and Sigma Alpha Epsilon Oregon- Alpha national fraternities. The colonization of these chapters created the first Panhellenic and Interfraternity Councils.

1916: Alpha Tau Omega Alpha Sigma chapter recolonizes, Sigma Chi Fraternity Beta Pi chapter and Theta Chi Sigma chapter charters.

1917: Pi Beta Phi chapter established July 23rd, Chi Omega Eta Alpha chapter chartered October 6th and Kappa Alpha Theta Beta Epsilon chapter chartered November 10th. Lambda Chi Alpha Fraternity Alpha Lambda chapter chartered March 3rd.

1918: Sigma Kappa Upsilon (the 9th oldest ΣΚ chapter) chartered March 17th, Gamma Phi Beta chapter established April 28th and Delta Delta Delta Theta Mu chapter chartered December 7th. Phi Delta Theta Fraternity Oregon- Beta chapter, Sigma Phi Epsilon Oregon-Alpha chapter chartered.

1919: Delta Zeta chapter chartered April 25th and Alpha Xi Delta chapter established May 30th.

1920: Alpha Sigma Phi Psi chapter chartered.

1921: Alpha Gamma Delta chartered May 23rd. Phi Gamma Delta (FIJI) Kappa Omicron chapter and Phi Sigma Kappa fraternity Theta Deuteron chapter colonized.

1922: Delta Upsilon chapter chartered.

1923: Zeta Tau Alpha established April 7th and Beta Theta Pi fraternity Gamma Mu chapter chartered.

1924: Kappa Kappa Gamma Gamma Mu chapter chartered June 7th, Alpha Gamma Rho Alpha Beta chapter Agricultural Fraternity and Tau Kappa Epsilon Tau chapter chartered.

1926: Alpha Delta Pi Founded February 6th followed by Alpha Omicron Pi Alpha Rho chapter founded June 5th and Kappa Delta Alpha Kappa chapter established October 16th. Delta Chi Fraternity Theta Delta Nu chapter chartered. 

1928: Kappa Delta Rho Sigma chapter chartered.

1931: Chi Phi fraternity Epsilon Delta chapter chartered.

1937: Name of institution formally changed to Oregon State College.

1945: Delta Sigma Theta Sorority, Inc. Beta Psi chapter chartered.

1946: Delta Gamma Beta Upsilon chapter chartered April 27th.

1947: Alpha Phi chapter chartered May 17th.

1948: Phi Kappa Psi Oregon- Beta chapter chartered.

1954: OSU alumni and Delta Upsilon Fraternity member Linus Pauling receives his 1st Nobel Prize in Chemistry. (In 1964 he became the first person to win 2 Nobel Prizes, one in chemistry and one in peace).

1960s: Beta Theta Phi fraternity hosts “Turtle Derby” philanthropy event. Raising money for the Children’s Farm Home just outside of town. In 1973, they also added rabbits into the race.

1961: Name of institution changed to Oregon State University.

1964: Alpha Xi Delta chapter is closed.

1970: Zeta Tau Alpha charter is withdrawn after disagreement between National organization and OSU regarding recruiting all students no matter their ethnicity. Acacia fraternity chapter is established, Pi Kappa Phi Fraternity Alpha Zeta chapter and Sigma Pi Omega chapter chartered. 

1972: Phi Sigma Kappa chapter closed.

1976: Sigma Chi fraternity and Delta Delta Delta host a teeter-totter fundraiser, where they raised $3,000 while teeter tottering for a consecutive 120 hours.

1977: Delta Zeta charter is withdrawn.

1978: Kappa Alpha Psi Fraternity, Inc. Iota Iota chapter chartered 

1979: Alpha Xi Delta chapter is reopened.

1982: Kappa Delta Alpha Kappa chapter is closed.

1987: Kappa Delta Alpha Kappa chapter is reopened.

1989: Phi Sigma Kappa fraternity reopened.

1991: Women in Agriculture sorority Sigma Alpha Xi chapter chartered.

1992: Alpha Omicron Pi and Kappa Delta Rho charters are withdrawn.

1995: Phi Gamma Delta chapter closes.

1996: Alpha Delta Pi charter is withdrawn.

1997: Gamma Phi Beta charter is withdrawn, Phi Gamma Delta Kappa Omicron chapter reopens.

1998: Beta Theta Pi closes due to financial hardships.

1999: Omega Delta Phi Alpha Theta chapter chartered.

2000: Latina-founded multicultural organization Gamma Alpha Omega Sorority Inc. chartered. Alpha Kappa Alpha Sorority, Inc. Sigma Delta chapter chartered.

2004: Alpha Sigma Phi chapter is closed.

2005: Alpha Xi Delta sorority and Phi Sigma Kappa fraternity chapters closed. Phi Sigma Rho Sorority for women in technical studies Sigma chapter chartered, Sigma Beta Rho multicultural fraternity Alpha Gamma chapter chartered.

2006: Pi Beta Phi charter is withdrawn, Women in Science sorority Sigma Delta Omega and Delta Phi Omega south Asian focused multi cultural sorority Nu chapter chartered.

2010: Lambda Theta Phi Latin Fraternity Inc Delta Epsilon chapter chartered.

2011: Triangle Fraternity with men in science and engineering focus colonized. Kappa Delta Chi Hispanic/Latina multi cultural focused Alpha Psi chapter chartered.

2012: Alpha Sigma Phi Psi chapter and Kappa Delta Rho Sigma chapters re charter.

2013: Chi Theta Phi Sorority (members focus on School of Design and Human Environment) chapter and Alpha Pi Omega Native American sorority Kappa chapter chartered.

2014: Alpha Omicron Pi Alpha Rho chapter reestablishes. The first OSU National Pan-Hellenic Council (Divine Nine) chapter is chartered, Zeta Phi Beta Sorority Inc. Xi Upsilon chapter.

2015: The community celebrated 100 years of consecutive Greek life. There are currently 46 Greek Organizations at OSU and consistently growing every year!

2017: Sigma Nu Delta Tau Chapter re-chartered, Pi Kappa Alpha Beta Nu Chapter re-chartered, Delta Tau Delta re-colonized, Farmhouse Fraternity chartered.

2018: Alpha Epsilon Pi Omicron Sigma chapter colonized.  

2019: Lambda Phi Epsilon chartered.



Corvallis Area Alumnae Panhellenic pamphlet, shared at the Annual brunch on February 28th, 2015

Chapter Profile details at: