The sorority reached a centennial year and became the first Black Greek-lettered organization to participate in the Tournament of Roses Parade in Pasadena, California, on January 1, 2013, with a float entitled "Transforming Communities through Sisterhood and Service".

Delta Sigma Theta expanded west of the Rocky Mountains with the chartering of the Kappa chapter at the University of California in February 1921; however, its members weren't initiated until September 1922.

[21] Vice President Lyndon B. Johnson and Supreme Court Justice William O. Douglas also addressed the membership during the Golden Anniversary Celebration in 1963 at a reception held January 13.

[22] Founders Osceola McCarthy Adams, Winona Cargile Alexander, Ethel Cuff Black, Bertha Pitts Campbell, Myra Davis Hemmings, Jimmie Bugg Middleton, Eliza Pearl Shippen, Florence Letcher Toms, Wertie Blackwell Weaver, and Madree Penn White were in attendance.

It kicked off its centennial year by being the first Black Greek letter organization to participate in the Tournament of Roses Parade in Pasadena, California, with a float entitled "Transforming Communities through Sisterhood and Service.

[25] On Thursday, January 10, 2013, hundreds of members of Delta Sigma Theta gathered in New York City in Times Square for appearances on the Today Show and Good Morning America,[26] followed by a caravan to Washington, D.C., which included buses bearing the Centennial logo.

[31] Designated areas of the school were named in honor of the seven former national presidents: Frankie Muse Freeman, Thelma T. Dailey, Mona Humphries Bailey, Bertha M. Roddey, Marcia L. Fudge, Gwendolyn E. Boyd, and Louise A.

[51] Jabberwock, an annual variety show consisting of cultural expression and talent – such as music, skits, and dance – was initiated by Marion Conover-Hope in 1925 in Boston, Massachusetts.

[59] The sorority created the program to address concerns that black women were limited in their choices of occupations and that they lacked training because of the economy and World War II.

[61] Gibbs is the Genworth Financial's Vice-President of Affordable Housing and Industry Affairs,[61] and Richardson is Chase Bank's Vice President of National Strategic Partnerships.

[64] Habitat for Humanity builds and rehabilitates homes with the help of selected homeowners, volunteer labor, management expertise, and tax-deductible donations of money and materials.

Workshops are focused on topics such as debt management and reduction, retirement, financing for college, investing, insurance, estate and home ownership, savings, and entrepreneurship.

[71] Delta Towers II will be designed to provide a senior citizen wellness center, ground level commercial office and retail services, and a community room.

[71] The sorority established the Delta Hurricane Katrina Relief Task Force to facilitate the needs of Gulf Coast residents affected by the national disaster.

Collectively $700,000 was awarded to Dillard, Xavier, and Southern Universities over four years and a total of more than $1.2 million was committed to agencies, organizations, members, and other residents of the affected Gulf areas.

[72] Dr. Betty Shabazz's Delta Academy ("Catching the Dreams of Tomorrow, Preparing Young Women For the 21st Century") is designed for girls ages 11 to 14, who have an interest in developing leadership skills.

[75] Lawry's Foods partnered with Delta Sigma Theta to create the National Collegiate Public Service Caddy and Grant Recognition Program.

Both informal and empirical data suggest that the vast majority of African-American males continue to be in crisis and are not reaching their fullest potential educationally, socially, and emotionally.

[82] The Distinguished Professor Endowed Chair Award, established in 1977 at the 34th National Convention as a perpetual trust fund, confirms and extends the sorority's longstanding commitment to educational excellence through quality instruction at historically Black colleges and universities.

Delta Sigma Theta's purpose is to support and sustain these historical institutions, supply assistance to enable the expansion of educational opportunities, and give long-overdue recognition to distinguished Black instructors and professors.

Biennially, Delta Sigma Theta makes a grant to a historically Black college or university that provides support for a professor of distinction to be in residence.

[84] In 2006, Delta Sigma Theta, in collaboration with Dr. Ian K. Smith and State Farm Insurance, began a partnership, encouraging members to become healthier by exercising and eating properly.

Several years later, Terrell confided her feelings about the National American Woman Suffrage Association and suffragist leader Alice Paul to NAACP representative Walter White.

[93] Topics included empowering members to be effective social action advocates in the areas of quality education, affordable health care, Census 2010, and economic viability.

[94] National President Gwendolyn Boyd accepted the credentials on behalf of the sorority, before 150 UN members from across the world, in a presentation by Hanifa Mezoui, Chief NGO Secretary in the Department of Economic and Social Affairs of the UN (ECOSOC).

"[94] Delta Sigma Theta was granted Special Consultative Status as an NGO to the Economic and Social Council of the UN as a result of volunteer services and humanitarian efforts around the world.

[103] Mary Help of the Sick Mission Hospital now has 121 beds and provides affordable prenatal and postnatal care, nutritional education, child immunization, and family planning.

News reports indicate that the couple spent the money on items like designer Coach handbags, rental cars, real estate, Amazon purchases, and other expenses between 2017 and 2019.

[112] At East Carolina University, in November 2010, Delta pledges Victoria Carter and Briana Gather died in a traffic accident around 6:30 am on the way to a hair appointment that had been set up to prepare for initiation.

According to the lawsuit filed by the family, she was suffering from "excessive and overwhelming fatigue, exhaustion and sleep deprivation and fell asleep behind the wheel" due to the pledging exercises.