It's according to a new analysis done by Cook County Treasurer Maria Pappas.
Her office released its Tax Year 2023 analysis, which examined nearly 1.8 million tax bills.
The median bill went up more than 19% in the south suburban region, which was also recently reassessed.
That's the largest percentage increase in nearly 30 years, data from the treasurer's office said.
In 15 of those suburbs, taxes soared 30% or more.
Of those 15 suburbs, 13 have mostly Black populations, a news release from Pappas' office said Thursday. In two towns, Dixmoor and Phoenix, the median tax bill more than doubled, it said.
SEE ALSO: Cook County Assessor to correct thousands of property tax assessment errors in south, west suburbs
Pappas said the residential home increases are due to the COVID-19 assessment reduction ending, higher home prices and businesses successfully appealing their assessments.
"I'm sitting in my house with fewer groceries, and, suddenly, I'm hit with this bill, which is bigger than I've ever seen in my lifetime. How am I going to manage this?" Pappas said. "Many homeowners are going to be shocked and angry when they get their bills. South suburban homeowners already pay some of the highest property taxes in the county, and these increases will make paying those bills even more difficult."
Homeowners in Park Forest were particularly hard hit: The median residential bill rose by 56% to $7,152. In Dixmoor, the median bill increased by 122%, to $1,950. And, in Phoenix, where nearly all of the village is in a tax increment finance district, the median bill shot up by 107% to $1,744, the news release said.
Pappas said no matter where you live your bills show you the government agencies that get your tax money.
"Now, your bills say 'Where did my money go?' and on one side it lists the government bodies, and on the other it lists whether it is more or less," Pappas said.
The ABC7 Chicago I-Team has been reporting on the challenges homeowners are facing with higher property tax bills and how many residents in south and southwest suburbs face even higher bills than others in northern suburbs because some southern municipalities have higher "property tax rates" to cover school costs.
Experts say the increased tax burden in the south suburbs is partially due to them having fewer businesses, fewer occupied homes and fewer high-priced homes.
The second installment property tax bills are due Aug. 1.