In addition to the "traditional" prison gangs identified on the Prison Gang page, there are many other prison gangs that are lesser known and non-traditional but none the less dangerous, prison gangs. These other prison gangs frequently align themselves with other prison gangs who may have similar cultural or criminal beliefs. In some instances prison gangs (and street gangs) have been known to have truces with rival prison gangs strictly for the purpose of facilitating their criminal activities; i.e. supply and distribution of narcotics.

Although the following non-traditional prison gangs usually have the largest number of members in the corrections system in which they originated, many have spread (through the interstate compact system) to other state departments of corrections as well as the Federal Bureau of Prisons.