Just before 11 a.m. Saturday, a 2020 Kia Soul struck the boy, later identified as Giovanni Leon, in the 800-block of Dixie Highway, Chicago Heights police said.
He was transported to Franciscan Health Hospital and then airlifted to Stroger Hospital, police said. But he was pronounced dead at 12:47 p.m. Sunday, according to the Cook County medical examiner's office.
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The driver of the vehicle was also injured and transported to Advocate South Suburban Hospital, police said.
No charges or citations have been issued.
Sun-Times Media contributed to this report.