Sigma Alpha Epsilon National Fraternity: Official site of the Sigma Alpha Epsilon Fraternity, founded at the University of Alabama, Tuscaloosa, on March 9th, 185

Sigma Alpha Mu - Official Site: This is the official web site for the national organization of Sigma Alpha Mu fraternity

Sigma Chi International Fraternity - Official Site: International men's fraternity founded on June 28, 1855 at the University of Miami in Oxford, Ohio. The fundamental purpose of the Sigma Chi Fraternity is to cultivate an appreciation of and commitment to the ideals of friendship, justice and learning

Sigma Delta Tau National Sorority - Official Site: Founded at Cornell University on March 25, 1917 as a sorority which would respect the individuality of its members, especially religious minorities. SDT is a member of the National Panhellenic Conference

Sigma Kappa Sorority - Official Site: National sorority founded on November 9, 1874 at Colby College in Waterville, Maine

Sigma Nu - Official Site: National fraternity founded in 1869

Sigma Phi Epsilon Fraternity - Grand Chapter Site: Located in Richmond, Virginia. Fast Facts, events, national chapter listing, information for new members and parents, Educational Foundation information, scholarship applications and contact information included

Sigma Pi - Official Site: International fraternity founded in 1897

Sigma Tau Gamma: Official site with calendar, philanthropies, information on joining and links