Psi Upsilon
- Chapter name: Omicron
- Date founded: 1910
- Location and date of house(s): 313 E. Armory, Champaign (1924-1943, 1946-present)
- Former residences: 606 E. Green, Champaign (1910-1911); 410 E. Green, Champaign (1911-1913, 1915-1924), 302 E. Green, Champaign (1913-1915)
Sigma Alpha Mu
- Chapter name: Rho
- Date founded: 1918
- Location and date of house(s): 301 E. Armory, Champaign (1959-1991, 1994-present; built in 1927 as chapter house of Pi Kappa Alpha fraternity)
- Former residences: 108 E. Green, Champaign (1921-1922); 1008 S. Fifth, Champaign (1922-1943, 1944-1948); 712 W. Oregon, Urbana (1943-1944); 1104 W. Illinois, Urbana (1948-1949); 511 E. Daniel, Champaign (1949-1951); 509 E. Daniel, Champaign (1951-1952); 805 W. Pennsylvania, Urbana (1952-1959)
Sigma Chi
- Chapter name: Kappa Kappa
- Date founded: 1881
- Location and date of house(s): 410 E. John, Champaign (1909-1943, 1944-1973, 1976-present; addition built in 1960)
- Former residences: 410 E. John, Champaign (1899-1908); 106 E. Green, Champaign (1908-1909); 707 S. Wright, Champaign (1944); 52 E. Armory, Champaign (1973-1976)
Sigma Nu
- Chapter name: Gamma Mu
- Date founded: 1902
- Location and date of house(s): 1009 W. Pennsylvania, Urbana (1931-1943, 1945-present)
- Former residences: 703 S. Third, Champaign (1902-1903); 610 E. Green, Champaign (1903-1906); 608 E. Green, Champaign (1906-1911); 618 E. Green, Champaign (1911-1913, 1915-1916); 106 E. Green, Champaign (1913-1915); 624 E. Green, Champaign (1916-1917); 807 S. Third, Champaign (1917-1919); 505 E. Green, Champaign (1919); 303 E. John, Champaign (1919-1930); 1002 S. Fourth, Champaign (1930-1931); 409 E. Green, Champaign (1944-1945)
Sigma Phi Delta
- Chapter name: Delta
- Date founded: 1928
- Location and date of house(s): 302 E. Gregory, Champaign (1963-present; built in ca. 1930 as chapter house of Alpha Epsilon Pi fraternity)
- Former residences: 407 E. Daniel, Champaign (1928-1929); 306 E. Green, Champaign (1929-1931); 1009 W. Green, Urbana (1931-1933?); 508 W. Green, Urbana (1940?-1943); 1103 W. Illinois, Urbana (1946-1962); 905 S. Fifth, Champaign (1962-1963)
Sigma Phi Epsilon
Chapter name: Illinois Alpha
- Date founded: 1903
- Location and date of house(s): 1105 S. Fourth, Champaign (1926-1943, 1945-1997, 2001-present)
- Former residences: 110 E. Green, Champaign (1917-1920); 404 E. Daniel, Champaign (1920-1926); 310 E. Gregory, Champaign (2000-2001)
Sigma Pi
- Chapter name: Phi
- Date founded: 1908
- Location and date of house(s): 713 W. Ohio, Urbana (2000-present; built in 1929 as chapter house of Phi Omega Pi sorority)
- Former residences: 112 E. Green, Champaign (1908-1911); 616 E. Green, Champaign (1911-1913, 1915-1916); 110 E. Green, Champaign (1913-1915); 618 E. Green, Champaign (1916-1917); 1006 S. Fifth, Champaign (1917-1918); 501 E. Daniel, Champaign (1918-1919); 908 S. Fourth, Champaign (1919-1920); 402 E. Armory, Champaign (1920-1943, 1944-1974); 608 S. Mathews, Urbana (1943-1944); 803 W. Oregon, Urbana (1974-1979); 901 S. Second, Champaign (1979-1997)
Sigma Tau Gamma
- Chapter name: Alpha Chi
- Date founded: 1956
- Location and date of house(s): 47 E. Chalmers, Champaign (1979-present)
- Former residences: 1109 S. Fourth, Champaign (1956-1976); 909 W. Illinois, Urbana (1976-1977); 1301 S. Busey, Urbana (1977-1979)