Below is a list of prison gang profiles, including location of operation, formation year, objectives, structure, organization, and known-leaders. This list is always being updated, so check back often.

• In 2005, a spokeswoman for the California corrections department, said there are "over 160,000 inmates in California prisons. Estimates put the prison gang population at 803 members, 900 associates, 325 inactive members and 1,050 dropouts" (24 February 2005 The San Francisco Chronicle).

United States

Aryan Brotherhood
The Aryan Brotherhood, now a potent force in prisons across the United States, began in 1967, in California's notorious San Quentin State Prison.

Black Guerilla Family
Like the Aryan Brotherhood after them, the Black Guerilla Family formed in San Quentin Penitentiary in 1966.

Bloods
Border Brothers
Church of the New Song
Crips
Dixie Mafia
Jamiyyat Ul Islam Is Saheeh
KUMI 415
Mexican Mafia
MS-13
Neta Association
Nuestra Familia
Sur 13 (Surenos)
Texas Syndicate
Trinitarios

Canada

Alberta Warriors
Indian Posse
Manitoba Warriors
Native Syndicate
Redd Alert
Saskatchewan Warriors

Brazil

First Command of the Capital
The militant prisoner-rights gang responsible for the recent July 2006 wave of violence in Sao Paulo.