Lambda Theta Alpha Latin Sorority, Inc. is the first and largest Latina-based sorority in existence. Founded in 1975, its principles are unity, love, and respect, and its goals are community activism, political awareness, and empowerment of Latinas and the Universal Woman.

Illinois Area One was established in 2004 by Beta Phi, Beta Chi, Beta Psi, and Gamma Mu chapters.  It has since grown to also include Delta Mu and Delta Nu Chapters and over 100 sisters in Illinois and Wisconsin.