Adding Sigma Alpha to the list as well. Note that this is organization is not affiliated with the professional agricultural sorority Sigma Alpha.
Sigma Alpha -
http://www.sigmaalphasorority.org/
Contact:
president@sigmaalphasorority.org
Founded: 1913
Size: over 50 chapters
Location: California, Florida, Illinois, Indiana, Kansas, Michigan, Missouri, Ohio, Pennsylvania, and Wisconsin
Philanthropy: Heartspring, a national private residential school for children with severe multiple disabilities.