Mayor Brandon Johnson has touted his administration as the "most diverse."

The U.S. Department of Justice launched an investigation into the city of Chicago after Mayor Brandon Johnson touted the number of Black officials in his administration.

When news broke Thursday about Robert Prevost's election as the first American pontiff, Pope Leo XIV, the mood throughout Chicago was joyous.

The mayor of Pope Leo’s hometown of Chicago called his election “one of the biggest moments in modern history” of the city.

As measles cases are on the rise in the United States, Chicago has reported the city's first case of the year.

Chakib Mansour Khodja was charged for incidents that occured between May 2022 and February 2025.

Human skeletal remains were discovered Tuesday outside Chicago. Police say they could belong to a woman who has been missing for 42 years.

The NTSB released a preliminary report on the close call at Chicago Midway, where a Flexjet plane crossed the same runway where a Southwest flight was coming in to land.

The lineup for Lollapalooza 2025 is here.

The Chicago River is once again glowing kelly green as the city opens its annual St. Patrick’s Day celebrations.

At least one person has been shot outside Chicago O'Hare International Airport early Wednesday morning, police said.

United identified the injured man as an employee, adding that the airline was "ensuring he receives any necessary support and care."

A driver has been hospitalized after driving straight through the guardrail of a parking garage and landing their car upside down on the street below, police said.

Chicago Mayor Brandon Johnson is on the defensive following the resignation of the school board over budgetary issues.

Four people were killed in a shooting early Monday on a Chicago Transit Authority train in Forest Park, Illinois. A suspect is in custody.

An investigation is underway after a suspect allegedly shot the sleeping victims on the city’s elevated commuter train system in Forest Park.

Four people were killed in a shooting early Monday on a Chicago Transit Authority train in Forest Park, Illinois. A suspect is in custody.

Minority and woman-owned businesses speak to ABC News about what it means to be involved in the Democratic National Convention.

Minority- and women-owned Chicago small businesses discuss being given the opportunity to be vendors for the Democratic National Convention.

Law enforcement will face a major test on Monday when thousands of pro-Palestinian protesters are expected to march in Chicago during the first day of the Democratic National Convention.

Hundreds of Black sailors have been exonerated for refusing orders to keep loading munitions after a pair of explosions killed hundreds of people. ABC News' Rhiannon Ally reports.

John Nicholas received a kidney from a childhood friend. Doctors said he was young and healthy enough only to use spinal anesthesia. He was back home less than 24 hours after receiving his new kidney.

Anish Kapoor's Cloud Gate, also known as The Bean, a sculpture in Millennium Park in Chicago, has reopened after plaza improvements.

The Chicago Police Department and the U.S. Marshals have taken Xavier L. Tate Jr. into custody on suspicion of murder.

Xaxier L. Tate Jr. was found Wednesday night in the Chicago suburb of Glendale Heights, Illinois, police said.

The sister of Officer Luis Huesca is pleading with the public to help investigators identify and catch a suspect who allegedly gunned him down.

Police have issued an arrest warrant for a 22-year-old in connection with the shooting of the 30-year-old officer and have increased the reward for information leading to the arrest of the shooter.

"I feel like the community needs to show up for him," the sister said.

The famous rat-sized dent in a Chicago sidewalk, dubbed the "rat hole," was removed and preserved by city officials Wednesday.

The famous rat-sized dent in a Chicago sidewalk, dubbed the "rat hole," was removed and preserved by city officials Wednesday.

Hoping for a break in the homicide investigation of Chicago police Officer Luis Huesca, investigators have released security video of a person of interest.

A Chicago police officer, who was gunned down Sunday outside his home after returning from his shift, had his gun taken from him as well as his car in the attack.

Police say the video shows a person of interest in the killing of Officer Luis Huesca.

Police are searching for a suspect and a motive in the shooting death of an off-duty Chicago police officer. Authorities say the officer was gunned down as he headed home from his shift.

Police said the officer was in his uniform, but with a jacket over it at the time he was shot.

Seven people lost their lives after multiple shootings during a violent weekend in Chicago including one child killed after gunfire erupted at a family gathering.

A child was killed and at least 10 other people were injured, including a 1-year-old and an 9-year-old, when gunfire broke out in Chicago, according to police.

The Chicago Civilian Office of Police Accountability has released bodycam footage of a police shooting that occurred last month in West Garfield Park.

The estimate from Johns Hopkins Bloomberg School of Public Health and the Stanford University School of Medicine was published in the journal JAMA Pediatrics.

At least eight people were hurt, including an infant, in the blaze, firefighters said.

Founded by a former NFL player, the Male Mogul Initiative teaches leadership and provides a path to success for young men from under-resourced Chicago neighborhoods.

A Chicago man — dressed in his swim trunks — braved the sub-zero wind chill to take a leisurely stroll on the pancake ice covering Lake Michigan.

A Chicago commuter train collided with rail equipment, injuring at least 19 people, officials said.

Five people were hospitalized after the tent that was set up for an event outside Chicago collapsed, investigators said.

ABC News’ Alex Perez is in Chicago where heat has forced schools to change schedules and cancel in-person classes.

Thousands of rubber ducks raced down the Chicago River and floated to the finish line in the annual Duck Derby, a charity event supporting Special Olympics Illinois.

Michael Goodman, 43, has been charged with first-degree murder in connection the death of Serabi Medina, Chicago police officials said in a statement.

Plus, a woman in Maine recovers after fighting off a black bear in her backyard.

More than 70 people were shot, 13 fatally, in Chicago over the holiday weekend, including a father of four who was gunned down at a Father's Day park gathering.

More than 50 people were shot, 11 fatally, over a violent Memorial Day weekend in Chicago, police said.