Delta Sigma Theta Sorority, Inc. is a historically Black Greek-letter organization founded on January 13, 1913, at Howard University in Washington, D.C. It was established by 22 visionary women with a mission to promote academic excellence, provide assistance to those in need, and to advocate for social change.

Throughout its history, Delta Sigma Theta has played a significant role in the advancement of civil rights and social justice. The sorority was involved in the Women's Suffrage March in 1913, and members marched alongside Dr. Martin Luther King, Jr. during the civil rights movement. Delta Sigma Theta has made lasting contributions to the struggle for equality and justice for African Americans.

The sorority has a strong focus on community service and has implemented numerous programs to address important issues such as education, healthcare, and economic empowerment in African American communities. Delta Sigma Theta has also been a leader in the promotion of political awareness and involvement among Black women.

Today, Delta Sigma Theta has chapters all over the United States and abroad, and continues to make a positive impact through its commitment to sisterhood, scholarship, and service.