As of 2012, there were over 40 different street gangs estimated to be active in New Zealand. One police association estimates that up to 6,000 members are considered full-time members, with an additional 66,000 associate members who are active in gang behavior.
Around 40 percent of the inmates in one prison are members of a gang, with a large portion of gang members being Maori or Pacific Islanders.
Despite consisting of 15 percent of the population of New Zealand, Maoris and Pacific Islanders represent up to 50 percent of the prison population in New Zealand’s criminal justice system.
Source: Rebecca Kesby, “New Zealand gangs: The Mongrel Mob and other urban outlaws,” BBC News, September 25, 2012.