What are Gangs

A gang is a group of people who, through the organization, formation, and establishment of an assemblage, share a common identity.[1] In current usage it typically denotes a criminal organization or else a criminal affiliation. In early usage, the word gang referred to a group of workmen. In the United Kingdom the word is still often used in this sense, but it later underwent pejoration. The word gang often carries a negative connotation; however, within a gang which defines itself in opposition to mainstream norms, members may adopt the phrase as a statement of identity or defiance.


There is no single, generally accepted definition of a “gang.” State and local jurisdictions tend to develop their own definitions. The term “street gang” is often used interchangeably with “youth gang” as well as “criminal street gang,” with the latter explicitly denoting the element of criminal activity found almost universally in gang-related legislation (see Compilation of Gang-Related Legislation). However, the term “street gang” carries two specific meanings that increase its practical value. First, it suggests a common feature of gangs; they commonly have a street presence. Street socialization is a key feature of adolescent gangs (Vigil, 2002). Second, this term also refers to “street crimes,” that is, serious crimes that occur on the streets and that often are of concern to citizens and policymakers, including rape, robbery, aggravated assault, gun crimes, and murder.
The following criteria are widely accepted among researchers for classifying groups as gangs (Decker and Curry, 2003Esbensen et al., 2001;Klein, 1995bMiller, 1992Spergel, 1995):
  • The group has three or more members, generally aged 12–24.
  • Members share an identity, typically linked to a name, and often other symbols.
  • Members view themselves as a gang, and they are recognized by others as a gang.
  • The group has some permanence and a degree of organization.
  • The group is involved in an elevated level of criminal activity.
Findings from the National Youth Gang Survey (NYGS) show that law enforcement agencies report group criminality to be of greatest importance and the presence of leadership of least importance in defining a gang in their view (National Youth Gang Center, 2009, see Defining Gangs and Designating Gang Membership).
Some street gang definitions incorporate elements of organized crime (see FAQ No. 8: Are gangs involved in organized crime?). For example, a number of states use the following definition devised by the California legislature, often with minor modifications: “A Criminal Street Gang is any ongoing organization, association, or group of three or more persons, whether formal or informal, having as one of its primary activities the commission of criminal acts” (Street Terrorism Enforcement and Prevention Act, 1988, California Penal Code sec. 186.22[f]). For additional information, see Compilation of Gang-Related Legislation.