More fallout in the wake of a viral video that has resulted in hate crime charges and a police officer’s resignation.

A video shot in a Cook County forest preserve has caught fire on social media and is prompting blowback from county officials on both sides of the aisle.

Though not a terribly romantic process, walleye breeding at the Cook County Forest Preserve District produces thousands of young fish for county lakes. We take a closer look.

Once a year, scientists and veterinarians check on nesting birds at Baker’s Lake in Cook County, where they can also learn a lot about the environment – and predict possible health concerns for humans.

The outgoing Cook County clerk has some ideas to boost democracy and to avoid a repeat of the March primary debacle that surrounded the Cook County assessor’s race. David Orr joins us in discussion.

Of the five most populous cities in the country, only the Windy City saw a population drop in 2017, according to U.S. census data. But the city still has an edge over Houston.

Some North Side homeowners say the Cook County Assessor over-valued their property. Will other Chicago homes see a hike in their assessments?

Meet Cook County’s award-winning chief information officer who is trying to bring 21st century IT solutions to county government.

Of the top 10 most populous cities in the country, the Chicago metro area was the only one to see a decline. Chicago demographer Rob Paral says a “complex stew” of factors is behind the drop.

Despite a challenge from former Chicago alderman and unsuccessful mayoral candidate Bob Fioretti, Cook County Board President Toni Preckwinkle will once again take the top post in Cook County for what she says will be her final term.

Just how complicated is election law? An unexpected opening on the Cook County primary ballot offers some insight.

Voters this month will be tasked with electing Cook County Circuit Court judges. To help navigate the options, two Chicago bar associations screened and ranked each candidate. Here are their recommendations.

After a highly critical independent report finds Cook County property taxes punish the poor, officials from the assessor’s office are put in the hot seat.

WTTW’s 2018 Voters’ Guide to the Cook County Primary is an online resource designed to inform voters about the candidates running for office in the March 20 election. Learn more.

A bombshell report on Cook County’s property tax system exposes flaws in how the assessor determines how much residents owe in property taxes. 

Another race in the March 20 primary that is heating up: Cook County assessor. The field narrowed Tuesday to one contender taking on incumbent Joe Berrios, but the dirt is still flying.