The 10 Most Infamous Mexican Cartel Bosses — Including “El Mencho,” Who Was Just Killed

Before El Chapo, before the CJNG (Guadalajara Cartel), before any of the modern cartels, there was Félix Gallardo.

A former Mexican federal police officer and bodyguard to the governor of Sinaloa, he used those connections to build the Guadalajara Cartel in the 1980s — the first organization to unify Mexican drug trafficking under a single command.

He struck deals with Colombian cartels, taking 50% of all cocaine transported through Mexico rather than a cash fee, and reportedly pulled in $5 billion a year at the operation’s peak.

His downfall came after he ordered the kidnapping and torture-murder of DEA agent Enrique “Kiki” Camarena in 1985.

This is considered one of the most consequential killings in the history of the drug war, which triggered a massive US-Mexico law enforcement crackdown.

Arrested in 1989, Félix Gallardo continued running his operation from prison by cell phone and fax — until authorities figured that out too.

From his prison cell, he convened Mexico’s top drug traffickers at a house in Acapulco and divided the country into territories. That meeting essentially created every major cartel that followed.

He was granted house arrest in 2022 due to declining health. He is still alive, and still known as one of the worst Mexican cartel bosses of all time.

2. Joaquín “El Chapo” Guzmán

The most famous drug lord in the world — and arguably the most famous criminal of his generation.

El Chapo (meaning “Shorty,” as he’s just 5’6″) rose through the ranks of the Guadalajara Cartel before co-founding the Sinaloa Cartel with Ismael Zambada.

He helped build the Sinaloa Cartel into the largest drug trafficking organization on earth, controlling an estimated 40–60% of Mexico’s drug trade at its height.

He was arrested in 1993, escaped from a maximum security prison in a laundry cart in 2001, arrested again in 2014.

With a lot of help, he was able to escape through a mile-long tunnel dug beneath the shower of his cell in 2015 — one of the most audacious prison breaks in history.

Re-captured in 2016 and extradited to the US in 2017, he was convicted in 2019 and sentenced to life plus 30 years.

At his trial, a witness testified that El Chapo had paid a $100 million bribe to former Mexican president Enrique Peña Nieto.

He is currently held in the ADX Florence supermax prison in Colorado (AKA “the Alcatraz of the Rockies”) in near-total isolation.

3. Ismael “El Mayo” Zambada

Where El Chapo was theatrical, Zambada was invisible — and arguably one of the more dangerous Mexican cartel bosses because of it.

As the Sinaloa Cartel’s co-founder and operational backbone, El Mayo spent decades running one of the world’s most powerful criminal organizations.

He somehow evaded capture for longer than almost any major cartel figure in history; likely because of his ultra-low profile.

He built the cartel’s logistics empire: the tunnels, the submarines, the corrupted border officials, the global distribution network.

His arrest in 2024 was itself a story: he alleged that El Chapo’s son Joaquín Guzmán López had kidnapped him and delivered him to US agents at an airfield near El Paso against his will.

The other side said it was voluntary. Either way, Zambada, now in his mid-70s, found himself in US custody.

In August 2025, he pleaded guilty in a federal court in Brooklyn, acknowledging his role as a principal leader of the cartel and providing extensive testimony about decades of bribes paid to Mexican military and police commanders.

4. Amado Carrillo Fuentes — “The Lord of the Skies”

Carrillo Fuentes didn’t run the most violent cartel, but he may have run the most lucrative.

As the head of the Juárez Cartel in the 1990s, he earned his nickname by using a fleet of Boeing 727 jets to transport cocaine from Colombia in quantities that dwarfed anything his rivals were moving.

At his peak, he was believed to be worth $25 billion; more than any drug lord before or since.

Obsessed with secrecy, he decided in 1997 to undergo extensive plastic surgery to alter his appearance and disappear.

He died on the operating table on July 4, 1997, under circumstances that have never been fully explained.

The three surgeons who performed the operation were later found dead, encased in concrete inside steel drums.

5. Osiel Cárdenas Guillén — “The Friend Killer”

The Gulf Cartel boss who accidentally created the most dangerous enforcement unit in cartel history.

Cárdenas earned his nickname after ordering the execution of his own business partner — a murder carried out in front of his children at a baptism party.

To protect himself from rivals and the military, he recruited 31 deserters from Mexico’s elite special forces to serve as his private army.

He called them Los Zetas, which is now one of Mexico’s worst cartels.

That decision would reshape Mexican organized crime more than almost any other single act.

Cárdenas was arrested in 2003 after his gunmen threatened two US federal agents at point-blank range — an incident that made him the most wanted man in Mexico. He was extradited to the United States in 2007 and sentenced to 25 years.

Los Zetas eventually broke away from the Gulf Cartel entirely and became more powerful than the organization that created them.

6. Heriberto Lazcano — “El Lazca” (Z-3)

The man who turned Los Zetas from a bodyguard unit into a paramilitary empire.

After the original Z-1 commander was killed in 2002, Lazcano took over and transformed the Zetas into Mexico’s most feared criminal organization — expanding into extortion, kidnapping, oil theft, and human trafficking alongside the drug trade.

Under his leadership, the Zetas pioneered the use of extreme, public violence (ie. beheadings, mass graves, burning bodies) as a deliberate terror tactic. Other cartels quickly followed.

Lazcano was killed by Mexican marines in October 2012.

In a fitting coda to his bizarre life, his body was stolen from the morgue by armed men before authorities could confirm his identity. It was never recovered.

7. Miguel Ángel Treviño Morales — “Z-40”

If Lazcano built the Zetas’ empire, Treviño Morales was its most feared enforcer.

Known for extreme sadism even by cartel standards, he was reportedly responsible for some of the worst atrocities of the Mexican drug war, including mass executions of civilians.

He rose to lead the Zetas after Lazcano’s death, but his reign was short. He was captured by Mexican forces in July 2013 — just seven months after taking over — and was extradited to the United States.

A US court sentenced him to life in prison in 2022.

8. Rafael Caro Quintero

One of the founders of the Guadalajara Cartel alongside Félix Gallardo, Caro Quintero was arrested in 1985 for his role in the murder of DEA agent Kiki Camarena and sentenced to 40 years.

He was released in 2013 on a legal technicality — to the outrage of the US government, which immediately placed a $20 million bounty on him.

He spent years operating from hiding, allegedly returning to drug trafficking, before finally being recaptured in 2022 in Sinaloa and extradited to the United States in 2023 to face charges including the Camarena murder.

He is currently in US custody awaiting trial — nearly 40 years after the crime that first made him famous.

9. Nemesio Oseguera Cervantes — “El Mencho”

For years, El Mencho was the most wanted man in Mexico and carried a $15 million US bounty — the largest ever placed on a Mexican cartel leader.

As the founder and leader of the CJNG, he built what became Mexico’s most powerful and fastest-growing cartel in just over a decade, establishing a presence in every Mexican state and across all 50 US states.

He was notorious for audacity: his cartel shot down a military helicopter in 2015 with a rocket launcher, deployed drones fitted with explosives against law enforcement, and openly posted videos of armed convoys online.

On February 22, 2026, Mexican military forces shot and killed him during an operation in Jalisco.

His death triggered immediate retaliatory violence across at least nine Mexican states, including Jaslico and Sinaloa.

What happens to the CJNG without him remains one of the most consequential open questions in Mexican organized crime.

10. Nazario Moreno González — “El Más Loco” (The Craziest One)

This is the most unusual figure on this list, and perhaps the most unusual figure in the history of Mexican cartels.

Moreno González founded La Familia Michoacana and later the Knights Templar, a cartel that trafficked crystal meth while conducting religious ceremonies and distributing its own bible — written by Moreno González himself.

He positioned himself as a messianic figure, venerated by his followers like a saint.

The cartel engaged in social welfare programs in Michoacán while simultaneously running one of the most violent criminal enterprises in the country.

He was reportedly killed by Mexican federal forces in 2010, though no body was ever found. Authorities later admitted he had survived.

He was finally killed in a confrontation with marines in 2014; even his death bizarrely needed two attempts.