Greek Community Origins from Fraternities & Sororities at Iowa State by W.J. Miller, 1961
| 1875 | Delta Tau Delta, the first fraternity installed on July 17, 1875. |
| 1877 | First sorority installed on May 11, 1877, the Mu Chapter of I.C. Sororsis (Pi Beta Phi) |
| 1889 | Delta Delta Delta established |
| 1894 | Delta Tau Delta closes |
| 1897 |
The Noit Avarats was founded, later becomes Phi Gamma Delta. Sigma Sigma Chapter of Kappa Delta established |
| 1904 | Sigma Nu established |
| 1905 |
Sigma Alpha Epsilon established Kappa Delta re-established Beta Theta Pi established Kappa Sigma established |
| 1906 | Pi Beta Phi established |
| 1907 | Phi Gamma Delta established |
| 1908 | Alpha Tau Omega established |
| 1909 |
Theta Xi established Phi Delta Theta re-established Acacia established Phi Kappa Psi established |
| 1911 | Alpha Tau Delta established |
| 1912 | Delta Delta Delta re-established |
| 1913 | Pi Kappa Alpha established |
| 1914 |
Alpha Gamma Rho established Adelante re-established Phi Sigma Kappa established |
| 1915 | Tau Kappa Epsilon established |
| 1916 | Sigma Phi Epsilon established |
| 1917 | Lambda Chi Alpha established |
| 1918 | Gamma Phi Beta established |
| 1919 |
Theta Delta Chi established Chi Omega established Sigma Chi established |
| 1920 |
Alpha Sigma Phi established Theta Chi established |
| 1921 | Sigma Kappa established |
| 1922 |
Chi Phi established Sigma Pi established |
| 1923 |
Delta Chi established Alpha Gamma Delta established |
| 1924 | Phi Kappa Theta established |
| 1926 | Zeta Tau Alpha established |
| 1927 | FarmHouse established |
| 1928 | Phi Kappa Tau established |
| 1929 | Pi Kappa Phi established |
| 1931 | Delta Zeta established |
| 1932 | Alpha Chi Rho established |
| 1934 | Phi Omega Pi closes |
| 1939 | Phi Sigma Kappa closes |
| 1939 |
Zeta Tau Alpha closes Sigma Pi closes |
| 1946 | Kappa Kappa Gamma established |
| 1947 | Alpha Phi Alpha Fraternity, Inc. established |
| 1948 | Kappa Alpha Theta established |
| 1949 |
Beta Sigma Psi established Delta Sigma Phi established |
| 1961 |
Alpha Kappa Lambda established Alpha Chi Omega established |
| 1964 | Triangle established |
| 1968 | Alpha Omicron Pi established |
| 1969 | Alpha Xi Delta established |
| 1970 | Zeta Tau Alpha re-established |
| 1972 | Alpha Chi Rho closes |
| 1974 | Chi Phi closes |
| 1977 |
Alpha Phi established Omega Psi Phi Fraternity, Inc. established |
| 1982 | Sigma Gamma Rho Sorority, Inc. established |
| 1984 |
Kappa Alpha Psi Fraternity, Inc. established Phi Beta Sigma Fraternity, Inc. established |
| 1988 | Zeta Phi Beta Sorority, Inc. established |
| 1990 | Sigma Pi closes |
| 1992 |
Sigma Pi re-established Acacia closes |
| 1993 |
Phi Beta Chi established Sigma Lambda Beta established Sigma Tau Gamma established |
| 1994 | Sigma Tau Gamma closes |
| 1995 | Pi Kappa Alpha closes |
| 1996 |
Alpha Sigma Phi re-established Alpha Kappa Alpha Sorority, Inc. established Delta Sigma Theta Sorority, Inc. established |
| 1998 |
Zeta Tau Alpha closes Alpha Phi closes Pi Kappa Alpha re-established |
| 1999 |
Phi Kappa Psi closes Phi Kappa Tau closes Acacia re-established Alpha Kappa Alpha Sorority, Inc. closes |
| 2000 | Sigma Lambda Beta closes |
| 2001 | Delta Chi closes |
| 2003 |
Alpha Xi Delta closes Delta Sigma Phi closes Sigma Lambda Beta re-established |
| 2004 |
Phi Kappa Psi re-established Delta Lambda Phi colonized |
| 2005 |
Delta Chi re-established Alpha Sigma Kappa colonized |
