Delta Sigma Theta Sorority, Inc. is a historically Black Greek-letter organization founded on January 13, 1913, at Howard University. It was established by 22 collegiate women who sought to promote academic excellence, uplift the Black community, and address social issues through service and activism.

Delta Sigma Theta has played a significant role in Black history by advocating for civil rights, women's rights, and social justice. The sorority was involved in the Women's Suffrage Movement, the Civil Rights Movement, and continues to be active in addressing issues such as voter registration, education, healthcare disparities, and economic empowerment within the Black community.

Throughout its history, Delta Sigma Theta has been at the forefront of social change and has produced many notable members who have made significant contributions to Black history, such as Shirley Chisholm (the first Black woman elected to Congress), Dorothy Height (civil rights activist and former president of the National Council of Negro Women), and Roberta Wright Bignall (one of the first African American flight attendants).

Delta Sigma Theta Sorority is known for its commitment to sisterhood, scholarship, and service, and its members continue to uphold the organization's legacy of excellence and activism in Black history.