Sigma Gamma Rho Sorority, Inc. was organized on November 12, 1922 in Indianapolis, Indiana by seven school teachers. The group became an incorporated national collegiate sorority on December 30, 1929.

According to the official web site, "Sigma Gamma Rho Sorority's aim is to enhance the quality of life within the community. Public service, leadership development and education of youth are the hallmark of the organization's programs and activities. Sigma Gamma Rho addresses concerns that impact society educationally, civically, and economically."