The D.C. Blacks is an African-American prison gang in the United States whose members are from Washington D.C.. They are allied with the Black Guerrilla Family and some other black prison gangs. The Aryan Brotherhood is one of their main rivals. The D.C. Blacks make up one of the largest single ethnic groups in the overall federal prison population by 10 percent. They are known for being well educated in violence, locker knocking, petty theft, and rape from their time spent at Lorton, a D.C. penitentiary. Although the D.C. Blacks are one of the largest prison gangs within penitentiaries, they are small compared to the gangs outside of the prison system, such as the Bloods and the Crips.