Prison and Street Gangs in the United States: Full Profiles, Stats & Rankings

Gangs - whether formed on the street or behind prison walls - remain one of the most persistent public safety concerns in the United States. Whether you're researching gang history for a school project, trying to understand warning signs as a parent, or checking whether someone in your life has a documented gang-related record, this guide breaks down what gangs exist, how they operate, and where they're most active.

The FBI estimates there are roughly 33,000 gangs - including street gangs, motorcycle gangs, and prison gangs - operating across the country, with total membership estimated at 1.4 million people. That figure includes everyone from small local crews to nationally organized networks with tens of thousands of members spread across dozens of states.

Gangs aren't confined to any one region. They're active in all 50 states, U.S. territories, and the District of Columbia - though, as covered below, some states and cities carry a disproportionate share of gang activity.

The 6 Nationally Recognized Prison Gangs

While thousands of gangs exist, only a handful are considered “nationally recognized” prison gangs - meaning they have an established presence across multiple state and federal correctional systems, rather than being confined to one region or facility.

These gangs are typically organized along racial or ethnic lines, have an established leadership hierarchy, and generate income primarily through drug trafficking, extortion, and smuggling.

Street Gangs vs. Prison Gangs: What's the Difference?

The two terms get used interchangeably, but they describe different things:

• Street gangs form and operate in communities, outside of correctional facilities. Their main activities include drug distribution, robbery, and turf-based violence. Members may end up incarcerated, but the gang itself originated on the street.
• Prison gangs form and are governed from within correctional institutions. They tend to be more tightly organized than street gangs, with strict codes of conduct and lifetime membership expectations. Many prison gangs also maintain criminal operations outside prison walls through members who've been released or through corresponding leadership.

In practice, the line blurs - plenty of national gangs (like the Bloods or Crips) operate as both a street presence and a prison presence simultaneously, with members moving between the two. You can look up someone's incarceration history directly through inmate search if you're trying to confirm current or past custody status.

U.S. Prison Population Snapshot

Source: Bureau of Justice Statistics, “Prisoners in 2023 - Statistical Tables.”

Top 10 States by Prison Population

States with the largest overall populations tend to have the largest prison populations by raw count - but the gap between raw numbers and per-capita rates tells a different story. States generally cited as having the largest state prison populations include Texas, California, Florida, Georgia, Ohio, Pennsylvania, Arizona, New York, Michigan, and Virginia.

States with the Highest Gang Activity Per Capita

Raw gang member counts favor big states — but per-capita numbers point to a different group entirely, according to National Gang Center survey data:

Cities & Counties Most Associated with Gang Activity

Gang activity in the U.S. is heavily concentrated rather than evenly spread - larger cities and suburban counties account for roughly two-thirds of all gangs nationwide and more than 80% of all gang members, while rural counties account for just over 5%.

If you're researching someone's background in one of these areas, it's worth checking for documented criminal or gang-related records rather than relying on a city's general reputation.

Gangs typically target young people from unstable or low-income households who are looking for a sense of belonging, protection, or financial opportunity. Common recruitment patterns include:

• Showering younger kids with gifts, cash, or status in exchange for small tasks like acting as lookouts
• Recruiting through family ties - a sibling or parent already in a gang significantly increases the odds of recruitment
• Targeting kids as young as 12, since juveniles face lighter legal consequences
• Increasingly, using social media and online multiplayer games to identify and groom potential recruits
• Expanding beyond traditional urban areas into suburban and rural communities as the drug trade grows

Warning signs that a young person may be getting drawn in include sudden possession of expensive items, secrecy around phone use, changes in clothing or speech patterns, and withdrawal from family.

Most gang income comes from a mix of traditional and increasingly sophisticated criminal enterprises:

• Drug trafficking - the single largest revenue source across nearly every major gang
• Robbery and extortion
• White-collar crime - identity theft, credit card fraud, and check fraud, which carry lighter penalties than drug trafficking, while remaining highly profitable
• Human trafficking and prostitution
• Legitimate-looking “front” businesses used to launder proceeds from illegal activity

Gang leaders frequently continue running these operations from behind bars - using coded letters, smuggled phones, and even social media to direct associates on the outside.

Nearly every major gang identifies itself through a combination of:

• Colors - the most well-known example is Bloods (red) vs. Crips (blue), but color affiliation extends across many other gangs and alliances (e.g., the broader “People Nation” vs. “Folk Nation” divide)
• Hand signs - finger combinations used to represent gang identity or send coded messages between members
• Tattoos and brands - specific symbols, numbers, or markings (like the “dog paw” brand used by some Bloods sets) that signal rank or affiliation
• Clothing and sports team gear - certain teams' colors or logos are adopted as a subtle way to display allegiance without wearing obvious gang colors
• Graffiti - used to mark territory, declare loyalty, or disrespect rival gangs (often by drawing rival symbols upside down)

These identifiers vary from set to set and city to city, so the same gang name can look different depending on where it operates - see each individual gang profile below for specifics.

Youth involvement in gangs remains one of the most serious ongoing concerns in gang research. Gang violence involving young people generally falls into two categories: intragang conflict (disputes and violence within a gang, often over internal power struggles) and intergang conflict (violence between rival gangs, usually over territory or drug trafficking).

Both forms of violence can have long-lasting effects on the young people involved, their families, and their broader communities - which is why early recognition of warning signs matters.

Signs a Young Person May Be Involved in a Gang

• Sudden possession of expensive items they can't explain
• Secretive behavior around text messages or phone calls
• Noticeable changes in clothing, appearance, or speech patterns
• New tattoos, hand signs, or specific color preferences
• Withdrawal from family and previous friend groups
• Spending increasing, unexplained time away from home

If you're concerned about who a young person in your life is associating with, running a background check on new acquaintances can help clarify whether there's a documented history worth being aware of.

Explore detailed profiles covering each gang's history, structure, symbols, and notable cases.

Prison Gangs

• Aryan Brotherhood
• Black Guerilla Family
• Mexican Mafia
• Nuestra Familia

Street Gangs

• Bloods
• Crips
• Gangster Disciples
• MS-13
• Latin Kings
• Vice Lords
• Simon City Royals
• Norteños
• Sureños
• Nazi Lowriders
• Ñetas
• Trinitarios
• Redd Alert

Regional & International Gangs

• Alberta Warriors
• Canadian Gangs
• Indian Posse