Delta Sigma Theta Sorority, Inc. is a historically Black Greek-letter organization that was founded on January 13, 1913, at Howard University in Washington, D.C. It was established by 22 collegiate women who sought to promote academic excellence and provide assistance to those in need.

Throughout its history, Delta Sigma Theta has been actively involved in social justice initiatives, civil rights advocacy, and community service. The sorority played a significant role in the Women's Suffrage Movement and was the only African American women's organization to participate in the historic 1913 Women's Suffrage March in Washington, D.C.

Delta Sigma Theta has also been a key player in the Civil Rights Movement, with many of its members, known as "Deltas," working alongside prominent figures such as Dr. Martin Luther King Jr. and participating in activities such as the Montgomery Bus Boycott and the March on Washington for Jobs and Freedom.

In addition to its advocacy work, Delta Sigma Theta is renowned for its commitment to public service and philanthropy. The sorority's numerous initiatives and programs focus on areas such as education, economic development, political awareness, and international awareness. Some of its signature initiatives include Delta Sigma Theta's Five Point Thrust - Economic Development, Educational Development, International Awareness and Involvement, Physical and Mental Health, and Political Awareness and Involvement.

Delta Sigma Theta has a rich legacy in Black history and continues to empower women and serve communities around the world.