All the single letter Sigma Kappa chapters. Cut and pasted from seraphimsprite's thread in the Sigma Kappa forum!
Alpha (1874-1984) - Colby College*
Beta (1890-1893) - Colby College - absorbed into Alpha*
Gamma (1892-1893) - Colby College - absorbed into Alpha*
Delta (1904) - Boston University
Epsilon (1905-1998?) - Syracuse University (New York)*
Zeta (1906) - George Washington University (DC)
Eta (1906) - Illinois Wesleyan University
Theta (1906) - University of Illinois
Iota (1908-1993?) - University of Denver*
Kappa (1908-1910?) - Brown University (Rhode Island)*
Lambda (1910) - UC Berkeley
Mu (1910) - University of Washington
Nu (1911-1968?) - Middlebury College (Vermont)*
Xi (1913) - University of Kansas
Omicron (1913-1956?) - Tufts University (Massachusetts)*
Pi (1915-1930?) - Stanford University*
Rho (1917-1940?) - Randolph-Macon Women's College (Virginia)*
Sigma (1917-1964?) - Southern Methodist University (Texas)*
Tau (1918-1994) - Indiana University*
Upsilon (1918) - Oregon State University
Phi (1919) - University of Rhode Island
Chi (1919-1998?) - Ohio State University*
Psi (1919-1958?) - University of Wisconsin*
Omega (1920-1999) - Florida State University*
* denotes inactive chapters . . . .